Basal cell carcinoma
- Overview
- Theory
- Diagnosis
- Management
- Follow up
- Resources
Treatment algorithm
Please note that formulations/routes and doses may differ between drug names and brands, drug formularies, or locations. Treatment recommendations are specific to patient groups: see disclaimer
nevoid basal cell carcinoma (Gorlin-Goltz) syndrome
treatment of BCCs
Treat any coexisting basal cell carcinomas (BCCs) with conventional therapy.
Choice of treatment is dictated by the lesion size, location, number, subtype, depth of invasion, and tissue margin (if biopsied).[42]Nasr I, McGrath EJ, Harwood CA, et al; British Association of Dermatologists' Clinical Standards Unit. British Association of Dermatologists guidelines for the management of adults with basal cell carcinoma 2021. Br J Dermatol. 2021 Nov;185(5):899-920. https://onlinelibrary.wiley.com/doi/10.1111/bjd.20524 http://www.ncbi.nlm.nih.gov/pubmed/34050920?tool=bestpractice.com [44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1
Strict sun protection measures and frequent skin checks are recommended for people with nevoid basal cell carcinoma syndrome.
Hedgehog pathway inhibitor + treatment of BCCs
The hedgehog pathway inhibitors vismodegib and sonidegib may be considered for the management of nevoid basal cell carcinoma syndrome (NBCCS), but they are not approved by the US Food and Drug Administration for this indication.[42]Nasr I, McGrath EJ, Harwood CA, et al; British Association of Dermatologists' Clinical Standards Unit. British Association of Dermatologists guidelines for the management of adults with basal cell carcinoma 2021. Br J Dermatol. 2021 Nov;185(5):899-920. https://onlinelibrary.wiley.com/doi/10.1111/bjd.20524 http://www.ncbi.nlm.nih.gov/pubmed/34050920?tool=bestpractice.com [60]Tang JY, Mackay-Wiggan JM, Aszterbaum M, et al. Inhibiting the hedgehog pathway in patients with the basal-cell nevus syndrome. N Engl J Med. 2012 Jun 7;366(23):2180-8. http://www.ncbi.nlm.nih.gov/pubmed/22670904?tool=bestpractice.com [61]Piccerillo A, Di Stefani A, Costantini A, et al. Sonidegib after vismodegib discontinuation in a patient with Gorlin-Goltz syndrome and multiple basal cell carcinomas. Dermatol Ther. 2021 Sep;34(5):e15095. http://www.ncbi.nlm.nih.gov/pubmed/34379877?tool=bestpractice.com
Treatment is under a specialist team.
Treat any coexisting basal cell carcinomas (BCCs) with conventional therapy.
Strict sun protection measures and frequent skin checks are recommended for people with NBCCS.
Primary options
vismodegib: consult specialist for guidance on dose
OR
sonidegib: consult specialist for guidance on dose
low-risk subtype in non-cosmetically challenging location
conventional surgery
Standard excision is a first-line treatment for patients with low-risk basal cell carcinoma (BCC) and may be considered for select patients with high-risk tumours.[42]Nasr I, McGrath EJ, Harwood CA, et al; British Association of Dermatologists' Clinical Standards Unit. British Association of Dermatologists guidelines for the management of adults with basal cell carcinoma 2021. Br J Dermatol. 2021 Nov;185(5):899-920. https://onlinelibrary.wiley.com/doi/10.1111/bjd.20524 http://www.ncbi.nlm.nih.gov/pubmed/34050920?tool=bestpractice.com [46]Peris K, Fargnoli MC, Kaufmann R, et al. European consensus-based interdisciplinary guideline for diagnosis and treatment of basal cell carcinoma-update 2023. Eur J Cancer. 2023 Oct;192:113254. https://www.ejcancer.com/article/S0959-8049(23)00356-8/fulltext http://www.ncbi.nlm.nih.gov/pubmed/37604067?tool=bestpractice.com [48]Kim JYS, Kozlow JH, Mittal B, et al; Work Group, Invited Reviewers. Guidelines of care for the management of basal cell carcinoma. J Am Acad Dermatol. 2018 Mar;78(3):540-59. https://www.jaad.org/article/S0190-9622(17)32529-X/fulltext http://www.ncbi.nlm.nih.gov/pubmed/29331385?tool=bestpractice.com
BCC, regardless of the histological growth pattern, is characterised by asymmetrical subclinical extension beyond the clinically visible tumour. To ensure complete removal with histologically negative margins, standard excision must include a margin of clinically normal-appearing skin.[48]Kim JYS, Kozlow JH, Mittal B, et al; Work Group, Invited Reviewers. Guidelines of care for the management of basal cell carcinoma. J Am Acad Dermatol. 2018 Mar;78(3):540-59. https://www.jaad.org/article/S0190-9622(17)32529-X/fulltext http://www.ncbi.nlm.nih.gov/pubmed/29331385?tool=bestpractice.com [63]Drucker AM, Adam GP, Rofeberg V, et al. Treatments of primary basal cell carcinoma of the skin: a systematic review and network meta-analysis. Ann Intern Med. 2018 Oct 2;169(7):456-66. https://www.acpjournals.org/doi/10.7326/M18-0678 http://www.ncbi.nlm.nih.gov/pubmed/30242379?tool=bestpractice.com Excision with 4 mm clinical margins should result in complete removal in more than 95% of cases.[44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1 [64]Wolf DJ, Zitelli JA. Surgical margins for basal cell carcinoma. Arch Dermatol. 1987 Mar;123(3):340-4. http://www.ncbi.nlm.nih.gov/pubmed/3813602?tool=bestpractice.com Five-year recurrence rates are typically ≤5% following standard surgical excision, pending histological subtype.[59]Thomson J, Hogan S, Leonardi-Bee J, et al. Interventions for basal cell carcinoma of the skin. Cochrane Database Syst Rev. 2020 Nov 17;(11):CD003412. https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD003412.pub3/full http://www.ncbi.nlm.nih.gov/pubmed/33202063?tool=bestpractice.com
Care should be taken (by a pathologist) to ink all of the margins of the excisional specimen, and to evaluate for the presence of characteristic stroma of BCC at the tissue edges (margins). If such a stroma is seen at the margin, recurrence is still a possibility, as superficial components of BCC may exhibit so-called skip areas in the biopsy specimen.
Adverse effects include wound dehiscence and excessive scarring, as well as infections. Most of the adverse effects are relatively minor and can be relieved by medication.[62]Neville JA, Welch E, Leffell DJ. Management of nonmelanoma skin cancer in 2007. Nat Clin Pract Oncol. 2007 Aug;4(8):462-9. http://www.ncbi.nlm.nih.gov/pubmed/17657251?tool=bestpractice.com
curettage ± electrodesiccation and biopsy
A treatment option for selected low-risk lesions with three caveats; curettage and electrodesiccation should not be used to treat areas with terminal hair growth such as the scalp, pubic and axillary regions, or beard area due to the risk that a tumour extending down follicular structures might not be adequately removed; if the subcutaneous layer is reached during the course of curettage and electrodesiccation, then surgical removal should be performed instead. The effectiveness of this technique is determined by the ability of the clinician to distinguish between firm, normal dermis, and soft tumour tissue. As the subcutaneous adipose is softer than tumour tissue, the ability to completely remove tumour cells is diminished; if curettage and electrodesiccation is performed based on the appearance of a low-risk tumour, biopsy results of the tissue taken at the time of C&E should be reviewed to make sure that there are no high-risk pathological features that would require additional therapy.[42]Nasr I, McGrath EJ, Harwood CA, et al; British Association of Dermatologists' Clinical Standards Unit. British Association of Dermatologists guidelines for the management of adults with basal cell carcinoma 2021. Br J Dermatol. 2021 Nov;185(5):899-920. https://onlinelibrary.wiley.com/doi/10.1111/bjd.20524 http://www.ncbi.nlm.nih.gov/pubmed/34050920?tool=bestpractice.com [44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1 [48]Kim JYS, Kozlow JH, Mittal B, et al; Work Group, Invited Reviewers. Guidelines of care for the management of basal cell carcinoma. J Am Acad Dermatol. 2018 Mar;78(3):540-59. https://www.jaad.org/article/S0190-9622(17)32529-X/fulltext http://www.ncbi.nlm.nih.gov/pubmed/29331385?tool=bestpractice.com
The usual standard is curettage followed by electrodesiccation for up to three cycles.[42]Nasr I, McGrath EJ, Harwood CA, et al; British Association of Dermatologists' Clinical Standards Unit. British Association of Dermatologists guidelines for the management of adults with basal cell carcinoma 2021. Br J Dermatol. 2021 Nov;185(5):899-920. https://onlinelibrary.wiley.com/doi/10.1111/bjd.20524 http://www.ncbi.nlm.nih.gov/pubmed/34050920?tool=bestpractice.com
Curettage and electrodesiccation is not recommended for high-risk basal cell carcinoma because of unacceptably high recurrence rates.[6]Kauvar AN, Cronin T Jr, Roenigk R, et al. Consensus for nonmelanoma skin cancer treatment: basal cell carcinoma, including a cost analysis of treatment methods. Dermatol Surg. 2015 May;41(5):550-71. http://www.ncbi.nlm.nih.gov/pubmed/25868035?tool=bestpractice.com [47]Newlands C, Currie R, Memon A, et al. Non-melanoma skin cancer: United Kingdom National Multidisciplinary Guidelines. J Laryngol Otol. 2016 May;130(S2):S125-32. https://www.cambridge.org/core/journals/journal-of-laryngology-and-otology/article/nonmelanoma-skin-cancer-united-kingdom-national-multidisciplinary-guidelines/EC5EF7B3A87F26984E49F02239E1AD31 http://www.ncbi.nlm.nih.gov/pubmed/27841126?tool=bestpractice.com [48]Kim JYS, Kozlow JH, Mittal B, et al; Work Group, Invited Reviewers. Guidelines of care for the management of basal cell carcinoma. J Am Acad Dermatol. 2018 Mar;78(3):540-59. https://www.jaad.org/article/S0190-9622(17)32529-X/fulltext http://www.ncbi.nlm.nih.gov/pubmed/29331385?tool=bestpractice.com Outcomes are highly operator dependent and the procedure should be performed by an experienced practitioner.
shave removal
Shave removal is an option for low-risk basal cell carcinoma of the trunk or extremities.[44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1 The tumour is excised by making a transverse, bowl-shaped cut with a scalpel underneath the lesion.[65]Emmett AJ, Broadbent GD. Shave excision of superficial solar skin lesions. Plast Reconstr Surg. 1987 Jul;80(1):47-54. http://www.ncbi.nlm.nih.gov/pubmed/3602160?tool=bestpractice.com
cryosurgery or non-surgical topical therapies or radiotherapy
There are a number of alternatives for patients with superficial basal cell carcinoma (BCC) who are keen to avoid, or are unsuitable for, conventional surgery or curettage followed by electrodesiccation.[42]Nasr I, McGrath EJ, Harwood CA, et al; British Association of Dermatologists' Clinical Standards Unit. British Association of Dermatologists guidelines for the management of adults with basal cell carcinoma 2021. Br J Dermatol. 2021 Nov;185(5):899-920. https://onlinelibrary.wiley.com/doi/10.1111/bjd.20524 http://www.ncbi.nlm.nih.gov/pubmed/34050920?tool=bestpractice.com [44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1 [48]Kim JYS, Kozlow JH, Mittal B, et al; Work Group, Invited Reviewers. Guidelines of care for the management of basal cell carcinoma. J Am Acad Dermatol. 2018 Mar;78(3):540-59. https://www.jaad.org/article/S0190-9622(17)32529-X/fulltext http://www.ncbi.nlm.nih.gov/pubmed/29331385?tool=bestpractice.com
Radiotherapy may be considered for patients (including those with recurrent disease) who are not amenable to surgery, or for patients who may not tolerate surgery due to comorbidities or frailty (e.g., for an older adult with basal cell carcinoma [BCC] on the nasolabial fold).[42]Nasr I, McGrath EJ, Harwood CA, et al; British Association of Dermatologists' Clinical Standards Unit. British Association of Dermatologists guidelines for the management of adults with basal cell carcinoma 2021. Br J Dermatol. 2021 Nov;185(5):899-920. https://onlinelibrary.wiley.com/doi/10.1111/bjd.20524 http://www.ncbi.nlm.nih.gov/pubmed/34050920?tool=bestpractice.com [44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1 [48]Kim JYS, Kozlow JH, Mittal B, et al; Work Group, Invited Reviewers. Guidelines of care for the management of basal cell carcinoma. J Am Acad Dermatol. 2018 Mar;78(3):540-59. https://www.jaad.org/article/S0190-9622(17)32529-X/fulltext http://www.ncbi.nlm.nih.gov/pubmed/29331385?tool=bestpractice.com
Radiotherapy for recurrent BCC previously treated with radiotherapy is not recommended.[42]Nasr I, McGrath EJ, Harwood CA, et al; British Association of Dermatologists' Clinical Standards Unit. British Association of Dermatologists guidelines for the management of adults with basal cell carcinoma 2021. Br J Dermatol. 2021 Nov;185(5):899-920. https://onlinelibrary.wiley.com/doi/10.1111/bjd.20524 http://www.ncbi.nlm.nih.gov/pubmed/34050920?tool=bestpractice.com [44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1
Cosmesis is inferior to surgery, and the cure rate with radiotherapy may be lower.[48]Kim JYS, Kozlow JH, Mittal B, et al; Work Group, Invited Reviewers. Guidelines of care for the management of basal cell carcinoma. J Am Acad Dermatol. 2018 Mar;78(3):540-59. https://www.jaad.org/article/S0190-9622(17)32529-X/fulltext http://www.ncbi.nlm.nih.gov/pubmed/29331385?tool=bestpractice.com [59]Thomson J, Hogan S, Leonardi-Bee J, et al. Interventions for basal cell carcinoma of the skin. Cochrane Database Syst Rev. 2020 Nov 17;(11):CD003412. https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD003412.pub3/full http://www.ncbi.nlm.nih.gov/pubmed/33202063?tool=bestpractice.com Recurrence rates (3-5 years) of <10% have been reported for primary and recurrent disease treated with radiotherapy.[59]Thomson J, Hogan S, Leonardi-Bee J, et al. Interventions for basal cell carcinoma of the skin. Cochrane Database Syst Rev. 2020 Nov 17;(11):CD003412. https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD003412.pub3/full http://www.ncbi.nlm.nih.gov/pubmed/33202063?tool=bestpractice.com [80]Rowe DE, Carroll RJ, Day CL Jr. Long-term recurrence rates in previously untreated (primary) basal cell carcinoma: implications for patient follow-up. J Dermatol Surg Oncol. 1989 Mar;15(3):315-28. http://www.ncbi.nlm.nih.gov/pubmed/2646336?tool=bestpractice.com [81]Rowe DE, Carroll RJ, Day CL Jr. Mohs surgery is the treatment of choice for recurrent (previously treated) basal cell carcinoma. J Dermatol Surg Oncol. 1989 Apr;15(4):424-31. http://www.ncbi.nlm.nih.gov/pubmed/2925988?tool=bestpractice.com
Radiotherapy has well-known complications; for example, permanent hair loss, radiation burn, and increased risk of secondary cancers.[6]Kauvar AN, Cronin T Jr, Roenigk R, et al. Consensus for nonmelanoma skin cancer treatment: basal cell carcinoma, including a cost analysis of treatment methods. Dermatol Surg. 2015 May;41(5):550-71. http://www.ncbi.nlm.nih.gov/pubmed/25868035?tool=bestpractice.com
Cryosurgery has been used for a long time for the treatment of BCC, and it has been demonstrated to be effective for superficial variants. Reported recurrence rates of BCC with cryotherapy range from 0% to 13% for patients with primary BCC.[44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1 [47]Newlands C, Currie R, Memon A, et al. Non-melanoma skin cancer: United Kingdom National Multidisciplinary Guidelines. J Laryngol Otol. 2016 May;130(S2):S125-32. https://www.cambridge.org/core/journals/journal-of-laryngology-and-otology/article/nonmelanoma-skin-cancer-united-kingdom-national-multidisciplinary-guidelines/EC5EF7B3A87F26984E49F02239E1AD31 http://www.ncbi.nlm.nih.gov/pubmed/27841126?tool=bestpractice.com Disadvantages include scarring, difficulty in assessing recurrence and lack of tissue diagnosis or proof of tumour clearance.[47]Newlands C, Currie R, Memon A, et al. Non-melanoma skin cancer: United Kingdom National Multidisciplinary Guidelines. J Laryngol Otol. 2016 May;130(S2):S125-32. https://www.cambridge.org/core/journals/journal-of-laryngology-and-otology/article/nonmelanoma-skin-cancer-united-kingdom-national-multidisciplinary-guidelines/EC5EF7B3A87F26984E49F02239E1AD31 http://www.ncbi.nlm.nih.gov/pubmed/27841126?tool=bestpractice.com
Evidence suggests that imiquimod is effective for treating nodular and superficial BCC.[67]Love WE, Bernhard JD, Bordeaux JS. Topical imiquimod or fluorouracil therapy for basal and squamous cell carcinoma: a systematic review. Arch Dermatol. 2009 Dec;145(12):1431-8.
http://www.ncbi.nlm.nih.gov/pubmed/20026854?tool=bestpractice.com
A phase 3 randomised trial in patients with superficial or nodular BCC showed that imiquimod provided an 84% clinical success rate at 3 years, and 82.5% at 5 years.[68]Bath-Hextall F, Ozolins M, Armstrong SJ, et al. Surgery versus imiquimod for nodular superficial basal cell carcinoma (SINS) study group. Surgical excision versus imiquimod 5% cream for nodular and superficial basal-cell carcinoma (SINS): a multicentre, non-inferiority, randomised controlled trial. Lancet Oncol. 2014 Jan;15(1):96-105.
https://www.thelancet.com/journals/lanonc/article/PIIS1470-2045(13)70530-8/fulltext
http://www.ncbi.nlm.nih.gov/pubmed/24332516?tool=bestpractice.com
[69]Williams HC, Bath-Hextall F, Ozolins M, et al. Surgery versus 5% imiquimod for nodular and superficial basal cell carcinoma: 5-year results of the SINS randomized controlled trial. J Invest Dermatol. 2017 Mar;137(3):614-9.
https://www.jidonline.org/article/S0022-202X(16)32538-6/fulltext
http://www.ncbi.nlm.nih.gov/pubmed/27932240?tool=bestpractice.com
There is some evidence to suggest that recurrence rates in patients treated with topical imiquimod may be associated with tumour thickness.[70]McKay KM, Sambrano BL, Fox PS, et al. Thickness of superficial basal cell carcinoma (sBCC) predicts imiquimod efficacy: a proposal for a thickness-based definition of sBCC. Br J Dermatol. 2013 Sep;169(3):549-54.
http://www.ncbi.nlm.nih.gov/pubmed/23627639?tool=bestpractice.com
Of the non-surgical options, imiquimod has the best evidence to support its efficacy.[59]Thomson J, Hogan S, Leonardi-Bee J, et al. Interventions for basal cell carcinoma of the skin. Cochrane Database Syst Rev. 2020 Nov 17;(11):CD003412.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD003412.pub3/full
http://www.ncbi.nlm.nih.gov/pubmed/33202063?tool=bestpractice.com
Evidence indicates that imiquimod probably leads to fewer recurrences than methyl aminolevulinate photodynamic therapy (MAL-PDT); there is probably little to no difference between these treatments in terms of observer‐rated good/excellent cosmetic outcomes.
[ ]
How does imiquimod cream compare with methyl‐aminolevulinate photodynamic therapy (MAL‐PDT) for adults with basal cell carcinoma (BCC)?/cca.html?targetUrl=https://www.cochranelibrary.com/cca/doi/10.1002/cca.4165/fullShow me the answer Rarely, with imiquimod, systemic reactions occur and include flu-like symptoms, arthralgia, myalgia, fatigue, and lymphadenopathy.[6]Kauvar AN, Cronin T Jr, Roenigk R, et al. Consensus for nonmelanoma skin cancer treatment: basal cell carcinoma, including a cost analysis of treatment methods. Dermatol Surg. 2015 May;41(5):550-71.
http://www.ncbi.nlm.nih.gov/pubmed/25868035?tool=bestpractice.com
Topical fluorouracil has been demonstrated to be effective for the treatment of superficial BCC, cure rates of up to 90%, and 5 year survival probability of 70% have been reported.[6]Kauvar AN, Cronin T Jr, Roenigk R, et al. Consensus for nonmelanoma skin cancer treatment: basal cell carcinoma, including a cost analysis of treatment methods. Dermatol Surg. 2015 May;41(5):550-71. http://www.ncbi.nlm.nih.gov/pubmed/25868035?tool=bestpractice.com [71]Neale H, Michelon M, Jacob S, et al. Topical 5% 5-fluorouracil versus procedural modalities for squamous cell carcinoma in situ and superficial basal cell carcinoma: a retrospective cohort analysis. J Am Acad Dermatol. 2022 Aug;87(2):423-5. https://www.jaad.org/article/S0190-9622(21)02390-2/fulltext http://www.ncbi.nlm.nih.gov/pubmed/34478783?tool=bestpractice.com [72]Jansen MHE, Mosterd K, Arits AHMM, et al. Five-year results of a randomized controlled trial comparing effectiveness of photodynamic therapy, topical imiquimod, and topical 5-fluorouracil in patients with superficial basal cell carcinoma. J Invest Dermatol. 2018 Mar;138(3):527-33. https://www.jidonline.org/article/S0022-202X(17)33045-2/fulltext http://www.ncbi.nlm.nih.gov/pubmed/29045820?tool=bestpractice.com This treatment is useful for multiple, low-risk lesions on the head and neck, torso and legs, and should be administered by a dermatologist due to potential complications. Application site reactions are common, dose-dependent, and include pruritus, erythema, oedema, pain, hyperpigmentation, hypopigmentation, bleeding, crusting, and erosions.[6]Kauvar AN, Cronin T Jr, Roenigk R, et al. Consensus for nonmelanoma skin cancer treatment: basal cell carcinoma, including a cost analysis of treatment methods. Dermatol Surg. 2015 May;41(5):550-71. http://www.ncbi.nlm.nih.gov/pubmed/25868035?tool=bestpractice.com
Phototherapy is another option for superficial low-risk BCC. Results from systematic reviews have shown that rates of excellent or good cosmetic outcomes are higher with phototherapy compared with surgery.[59]Thomson J, Hogan S, Leonardi-Bee J, et al. Interventions for basal cell carcinoma of the skin. Cochrane Database Syst Rev. 2020 Nov 17;(11):CD003412. https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD003412.pub3/full http://www.ncbi.nlm.nih.gov/pubmed/33202063?tool=bestpractice.com [73]Cosgarea R, Susan M, Crisan M, et al. Photodynamic therapy using topical 5-aminolaevulinic acid vs. surgery for basal cell carcinoma. J Eur Acad Dermatol Venereol. 2013 Aug;27(8):980-4. http://www.ncbi.nlm.nih.gov/pubmed/22738399?tool=bestpractice.com [74]Wang H, Xu Y, Shi J, et al. Photodynamic therapy in the treatment of basal cell carcinoma: a systematic review and meta-analysis. Photodermatol Photoimmunol Photomed. 2015 Jan;31(1):44-53. http://www.ncbi.nlm.nih.gov/pubmed/25377432?tool=bestpractice.com [75]Collier NJ, Haylett AK, Wong TH, et al. Conventional and combination topical photodynamic therapy for basal cell carcinoma: systematic review and meta-analysis. Br J Dermatol. 2018 Dec;179(6):1277-96. http://www.ncbi.nlm.nih.gov/pubmed/29889302?tool=bestpractice.com Cure rates ranging from 60% to 100% have been reported for phototherapy, mainly for patients with superficial or nodular disease.[73]Cosgarea R, Susan M, Crisan M, et al. Photodynamic therapy using topical 5-aminolaevulinic acid vs. surgery for basal cell carcinoma. J Eur Acad Dermatol Venereol. 2013 Aug;27(8):980-4. http://www.ncbi.nlm.nih.gov/pubmed/22738399?tool=bestpractice.com [76]Horn M, Wolf P, Wulf HC, et al. Topical methyl aminolaevulinate photodynamic therapy in patients with basal cell carcinoma prone to complications and poor cosmetic outcome with conventional treatment. Br J Dermatol. 2003 Dec;149(6):1242-9. http://www.ncbi.nlm.nih.gov/pubmed/14674903?tool=bestpractice.com [77]Christensen E, Mørk C, Skogvoll E. High and sustained efficacy after two sessions of topical 5-aminolaevulinic acid photodynamic therapy for basal cell carcinoma: a prospective, clinical and histological 10-year follow-up study. Br J Dermatol. 2012 Jun;166(6):1342-8. http://www.ncbi.nlm.nih.gov/pubmed/22309486?tool=bestpractice.com [78]Osiecka B, Jurczyszyn K, Ziółkowski P. The application of Levulan-based photodynamic therapy with imiquimod in the treatment of recurrent basal cell carcinoma. Med Sci Monit. 2012 Feb;18(2):PI5-9. http://www.ncbi.nlm.nih.gov/pubmed/22293891?tool=bestpractice.com
Local adverse effects such as itching, erythema, and weeping are reported with topical therapies for BCC.[59]Thomson J, Hogan S, Leonardi-Bee J, et al. Interventions for basal cell carcinoma of the skin. Cochrane Database Syst Rev. 2020 Nov 17;(11):CD003412. https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD003412.pub3/full http://www.ncbi.nlm.nih.gov/pubmed/33202063?tool=bestpractice.com [63]Drucker AM, Adam GP, Rofeberg V, et al. Treatments of primary basal cell carcinoma of the skin: a systematic review and network meta-analysis. Ann Intern Med. 2018 Oct 2;169(7):456-66. https://www.acpjournals.org/doi/10.7326/M18-0678 http://www.ncbi.nlm.nih.gov/pubmed/30242379?tool=bestpractice.com [66]Wang BC, Fu C, Qin L, et al. Photodynamic therapy with methyl-5-aminolevulinate for basal cell carcinoma: a systematic review and meta-analysis. Photodiagnosis Photodyn Ther. 2020 Mar;29:101667. http://www.ncbi.nlm.nih.gov/pubmed/31978564?tool=bestpractice.com
Primary options
imiquimod topical: (5%) apply to the affected area(s) five times weekly for 6 weeks
OR
fluorouracil topical: (5%) apply to the affected area(s) twice daily for 3-6 weeks
low-risk subtype in cosmetically challenging location
Mohs surgery
Mohs surgery is a variant of dermatological surgery in which the practitioner examines margins via intraoperative consultation (ex tempore, frozen section) while the patient's site of procedure is still open.
It is a tissue-sparing technique that is often utilised in the facial and other cosmetically sensitive regions; scars are smaller than those of conventional surgery, and tissue defects are easier to repair.[53]Smeets NW, Stavast-Kooy AJ, Krekels GA, et al. Adjuvant cytokeratin staining in Mohs micrographic surgery for basal cell carcinoma. Dermatol Surg. 2003 Apr;29(4):375-7. http://www.ncbi.nlm.nih.gov/pubmed/12656816?tool=bestpractice.com Recurrence rates with Mohs surgery are very low (2% to 5%).[42]Nasr I, McGrath EJ, Harwood CA, et al; British Association of Dermatologists' Clinical Standards Unit. British Association of Dermatologists guidelines for the management of adults with basal cell carcinoma 2021. Br J Dermatol. 2021 Nov;185(5):899-920. https://onlinelibrary.wiley.com/doi/10.1111/bjd.20524 http://www.ncbi.nlm.nih.gov/pubmed/34050920?tool=bestpractice.com [79]Garcia C, Poletti E, Crowson AN. Basosquamous carcinoma. J Am Acad Dermatol. 2009 Jan;60(1):137-43. http://www.ncbi.nlm.nih.gov/pubmed/19103364?tool=bestpractice.com
Adverse effects can include wound dehiscence, excessive scarring, and infections.
Most of the adverse effects are relatively minor and can be addressed by medication.[62]Neville JA, Welch E, Leffell DJ. Management of nonmelanoma skin cancer in 2007. Nat Clin Pract Oncol. 2007 Aug;4(8):462-9. http://www.ncbi.nlm.nih.gov/pubmed/17657251?tool=bestpractice.com
high-risk subtype
Mohs surgery
Mohs surgery is a variant of dermatological surgery in which the practitioner examines margins via intraoperative consultation (ex tempore, frozen section) while the patient's site of procedure is still open. It is recommended for high-risk basal cell carcinoma [BCC] (e.g., large morpheaform BCC, and BCC with poorly defined clinical margins).[42]Nasr I, McGrath EJ, Harwood CA, et al; British Association of Dermatologists' Clinical Standards Unit. British Association of Dermatologists guidelines for the management of adults with basal cell carcinoma 2021. Br J Dermatol. 2021 Nov;185(5):899-920. https://onlinelibrary.wiley.com/doi/10.1111/bjd.20524 http://www.ncbi.nlm.nih.gov/pubmed/34050920?tool=bestpractice.com [44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1 [47]Newlands C, Currie R, Memon A, et al. Non-melanoma skin cancer: United Kingdom National Multidisciplinary Guidelines. J Laryngol Otol. 2016 May;130(S2):S125-32. https://www.cambridge.org/core/journals/journal-of-laryngology-and-otology/article/nonmelanoma-skin-cancer-united-kingdom-national-multidisciplinary-guidelines/EC5EF7B3A87F26984E49F02239E1AD31 http://www.ncbi.nlm.nih.gov/pubmed/27841126?tool=bestpractice.com [48]Kim JYS, Kozlow JH, Mittal B, et al; Work Group, Invited Reviewers. Guidelines of care for the management of basal cell carcinoma. J Am Acad Dermatol. 2018 Mar;78(3):540-59. https://www.jaad.org/article/S0190-9622(17)32529-X/fulltext http://www.ncbi.nlm.nih.gov/pubmed/29331385?tool=bestpractice.com
It is a tissue-sparing technique that is often utilised in the facial and other cosmetically sensitive regions; scars are smaller than those of conventional surgery, and tissue defects are easier to repair.[53]Smeets NW, Stavast-Kooy AJ, Krekels GA, et al. Adjuvant cytokeratin staining in Mohs micrographic surgery for basal cell carcinoma. Dermatol Surg. 2003 Apr;29(4):375-7. http://www.ncbi.nlm.nih.gov/pubmed/12656816?tool=bestpractice.com
Recurrence rates with Mohs surgery are very low (2% to 5%).[42]Nasr I, McGrath EJ, Harwood CA, et al; British Association of Dermatologists' Clinical Standards Unit. British Association of Dermatologists guidelines for the management of adults with basal cell carcinoma 2021. Br J Dermatol. 2021 Nov;185(5):899-920. https://onlinelibrary.wiley.com/doi/10.1111/bjd.20524 http://www.ncbi.nlm.nih.gov/pubmed/34050920?tool=bestpractice.com [79]Garcia C, Poletti E, Crowson AN. Basosquamous carcinoma. J Am Acad Dermatol. 2009 Jan;60(1):137-43. http://www.ncbi.nlm.nih.gov/pubmed/19103364?tool=bestpractice.com
Adverse effects can include wound dehiscence, excessive scarring, and infections.
Most of the adverse effects are relatively minor and can be addressed by medication.[62]Neville JA, Welch E, Leffell DJ. Management of nonmelanoma skin cancer in 2007. Nat Clin Pract Oncol. 2007 Aug;4(8):462-9. http://www.ncbi.nlm.nih.gov/pubmed/17657251?tool=bestpractice.com
positive margins on initial procedure
Mohs surgery
Mohs surgery is a variant of dermatological surgery in which the practitioner examines margins via intraoperative consultation (ex tempore, frozen section) while the patient's site of procedure is still open. It is recommended for the excision of low-risk basal cell carcinoma after positive margins with standard excision.[42]Nasr I, McGrath EJ, Harwood CA, et al; British Association of Dermatologists' Clinical Standards Unit. British Association of Dermatologists guidelines for the management of adults with basal cell carcinoma 2021. Br J Dermatol. 2021 Nov;185(5):899-920. https://onlinelibrary.wiley.com/doi/10.1111/bjd.20524 http://www.ncbi.nlm.nih.gov/pubmed/34050920?tool=bestpractice.com [44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1 [47]Newlands C, Currie R, Memon A, et al. Non-melanoma skin cancer: United Kingdom National Multidisciplinary Guidelines. J Laryngol Otol. 2016 May;130(S2):S125-32. https://www.cambridge.org/core/journals/journal-of-laryngology-and-otology/article/nonmelanoma-skin-cancer-united-kingdom-national-multidisciplinary-guidelines/EC5EF7B3A87F26984E49F02239E1AD31 http://www.ncbi.nlm.nih.gov/pubmed/27841126?tool=bestpractice.com [48]Kim JYS, Kozlow JH, Mittal B, et al; Work Group, Invited Reviewers. Guidelines of care for the management of basal cell carcinoma. J Am Acad Dermatol. 2018 Mar;78(3):540-59. https://www.jaad.org/article/S0190-9622(17)32529-X/fulltext http://www.ncbi.nlm.nih.gov/pubmed/29331385?tool=bestpractice.com
It is a tissue-sparing technique that is often utilised in the facial and other cosmetically sensitive regions; scars are smaller than those of conventional surgery, and tissue defects are easier to repair.[53]Smeets NW, Stavast-Kooy AJ, Krekels GA, et al. Adjuvant cytokeratin staining in Mohs micrographic surgery for basal cell carcinoma. Dermatol Surg. 2003 Apr;29(4):375-7. http://www.ncbi.nlm.nih.gov/pubmed/12656816?tool=bestpractice.com
Recurrence rates with Mohs surgery are very low (2% to 5%).[42]Nasr I, McGrath EJ, Harwood CA, et al; British Association of Dermatologists' Clinical Standards Unit. British Association of Dermatologists guidelines for the management of adults with basal cell carcinoma 2021. Br J Dermatol. 2021 Nov;185(5):899-920. https://onlinelibrary.wiley.com/doi/10.1111/bjd.20524 http://www.ncbi.nlm.nih.gov/pubmed/34050920?tool=bestpractice.com [79]Garcia C, Poletti E, Crowson AN. Basosquamous carcinoma. J Am Acad Dermatol. 2009 Jan;60(1):137-43. http://www.ncbi.nlm.nih.gov/pubmed/19103364?tool=bestpractice.com
Adverse effects can include wound dehiscence, excessive scarring, and infections. Most of the adverse effects are relatively minor and can be addressed by medication.[62]Neville JA, Welch E, Leffell DJ. Management of nonmelanoma skin cancer in 2007. Nat Clin Pract Oncol. 2007 Aug;4(8):462-9. http://www.ncbi.nlm.nih.gov/pubmed/17657251?tool=bestpractice.com
re-excision
If Mohs surgery is not available, re-excision of margins in a further procedure should ensure clearance.
complicated BCC recurrences and/or site not accessible to surgical and topical therapies
radiotherapy or hedgehog pathway inhibitor
Radiotherapy may be considered for patients (including those with recurrent disease) who are not amenable to surgery or for patients who may not tolerate surgery due to comorbidities or frailty (e.g., for an older adult with basal cell carcinoma [BCC] on the nasolabial fold).[42]Nasr I, McGrath EJ, Harwood CA, et al; British Association of Dermatologists' Clinical Standards Unit. British Association of Dermatologists guidelines for the management of adults with basal cell carcinoma 2021. Br J Dermatol. 2021 Nov;185(5):899-920. https://onlinelibrary.wiley.com/doi/10.1111/bjd.20524 http://www.ncbi.nlm.nih.gov/pubmed/34050920?tool=bestpractice.com [44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1 [48]Kim JYS, Kozlow JH, Mittal B, et al; Work Group, Invited Reviewers. Guidelines of care for the management of basal cell carcinoma. J Am Acad Dermatol. 2018 Mar;78(3):540-59. https://www.jaad.org/article/S0190-9622(17)32529-X/fulltext http://www.ncbi.nlm.nih.gov/pubmed/29331385?tool=bestpractice.com
Radiotherapy for recurrent BCC previously treated with radiotherapy is not recommended.[42]Nasr I, McGrath EJ, Harwood CA, et al; British Association of Dermatologists' Clinical Standards Unit. British Association of Dermatologists guidelines for the management of adults with basal cell carcinoma 2021. Br J Dermatol. 2021 Nov;185(5):899-920. https://onlinelibrary.wiley.com/doi/10.1111/bjd.20524 http://www.ncbi.nlm.nih.gov/pubmed/34050920?tool=bestpractice.com [44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1
Cosmesis is inferior to surgery, and the cure rate with radiotherapy may be lower.[48]Kim JYS, Kozlow JH, Mittal B, et al; Work Group, Invited Reviewers. Guidelines of care for the management of basal cell carcinoma. J Am Acad Dermatol. 2018 Mar;78(3):540-59. https://www.jaad.org/article/S0190-9622(17)32529-X/fulltext http://www.ncbi.nlm.nih.gov/pubmed/29331385?tool=bestpractice.com [59]Thomson J, Hogan S, Leonardi-Bee J, et al. Interventions for basal cell carcinoma of the skin. Cochrane Database Syst Rev. 2020 Nov 17;(11):CD003412. https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD003412.pub3/full http://www.ncbi.nlm.nih.gov/pubmed/33202063?tool=bestpractice.com Recurrence rates (3-5 years) of <10% have been reported for primary and recurrent disease treated with radiotherapy.[59]Thomson J, Hogan S, Leonardi-Bee J, et al. Interventions for basal cell carcinoma of the skin. Cochrane Database Syst Rev. 2020 Nov 17;(11):CD003412. https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD003412.pub3/full http://www.ncbi.nlm.nih.gov/pubmed/33202063?tool=bestpractice.com [80]Rowe DE, Carroll RJ, Day CL Jr. Long-term recurrence rates in previously untreated (primary) basal cell carcinoma: implications for patient follow-up. J Dermatol Surg Oncol. 1989 Mar;15(3):315-28. http://www.ncbi.nlm.nih.gov/pubmed/2646336?tool=bestpractice.com [81]Rowe DE, Carroll RJ, Day CL Jr. Mohs surgery is the treatment of choice for recurrent (previously treated) basal cell carcinoma. J Dermatol Surg Oncol. 1989 Apr;15(4):424-31. http://www.ncbi.nlm.nih.gov/pubmed/2925988?tool=bestpractice.com
Radiotherapy has well-known complications: for example, permanent hair loss, radiation burn and increased risk of secondary cancers.[6]Kauvar AN, Cronin T Jr, Roenigk R, et al. Consensus for nonmelanoma skin cancer treatment: basal cell carcinoma, including a cost analysis of treatment methods. Dermatol Surg. 2015 May;41(5):550-71. http://www.ncbi.nlm.nih.gov/pubmed/25868035?tool=bestpractice.com
The oral hedgehog pathway inhibitors sonidegib and vismodegib are approved by the US Food and Drug Administration for the treatment of recurrent disease.
Primary options
sonidegib: consult specialist for guidance on dose
OR
vismodegib: consult specialist for guidance on dose
advanced disease
neoadjuvant vismodegib or cemiplimab
Vismodegib (an oral hedgehog pathway inhibitor) is recommended as a neoadjuvant treatment for patients with locally advanced basal cell carcinoma (BCC).[44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1 One open-label, phase 2 non-comparative study demonstrated that neoadjuvant vismodegib allows for downstaging of surgical procedures in patients with locally advanced BCC in functionally sensitive locations.[83]Bertrand N, Guerreschi P, Basset-Seguin N, et al. Vismodegib in neoadjuvant treatment of locally advanced basal cell carcinoma: First results of a multicenter, open-label, phase 2 trial (VISMONEO study): neoadjuvant Vismodegib in Locally Advanced Basal Cell Carcinoma. EClinicalMedicine. 2021 May;35:100844. https://www.thelancet.com/journals/eclinm/article/PIIS2589-5370(21)00124-3/fulltext http://www.ncbi.nlm.nih.gov/pubmed/33997740?tool=bestpractice.com
Cemiplimab, a recombinant human immunoglobulin G4 monoclonal antibody that binds to programmed death receptor-1 (PD-1), may be used as neoadjuvant treatment when vismodegib is not appropriate.[44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1
Primary options
vismodegib: consult specialist for guidance on dose
Secondary options
cemiplimab: consult specialist for guidance on dose
surgery
Treatment recommended for ALL patients in selected patient group
Mohs surgery is the preferred method of excision for patients with locally advanced basal cell carcinoma (BCC; primary or recurrent).[44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1
If Mohs surgery is not available, standard excision may be considered.
Mohs surgery is a variant of dermatological surgery in which the practitioner examines margins via intraoperative consultation (ex tempore, frozen section) while the patient's site of procedure is still open. It is recommended for high-risk BCC (e.g., large morpheaform BCC and BCC with poorly defined clinical margins) and for the excision of low-risk BCC after positive margins with standard excision.[42]Nasr I, McGrath EJ, Harwood CA, et al; British Association of Dermatologists' Clinical Standards Unit. British Association of Dermatologists guidelines for the management of adults with basal cell carcinoma 2021. Br J Dermatol. 2021 Nov;185(5):899-920. https://onlinelibrary.wiley.com/doi/10.1111/bjd.20524 http://www.ncbi.nlm.nih.gov/pubmed/34050920?tool=bestpractice.com [44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1 [47]Newlands C, Currie R, Memon A, et al. Non-melanoma skin cancer: United Kingdom National Multidisciplinary Guidelines. J Laryngol Otol. 2016 May;130(S2):S125-32. https://www.cambridge.org/core/journals/journal-of-laryngology-and-otology/article/nonmelanoma-skin-cancer-united-kingdom-national-multidisciplinary-guidelines/EC5EF7B3A87F26984E49F02239E1AD31 http://www.ncbi.nlm.nih.gov/pubmed/27841126?tool=bestpractice.com [49]Stulberg D, Crandell B, Fawcett RS. Diagnosis and treatment of basal cell and squamous cell carcinomas. Am Fam Physician. 2004 Oct 15;70(8):1481-8. http://www.ncbi.nlm.nih.gov/pubmed/15526735?tool=bestpractice.com
Mohs surgery is a tissue-sparing technique that is often utilised in the facial and other cosmetically sensitive regions; scars are smaller than those of conventional surgery, and tissue defects are easier to repair.[53]Smeets NW, Stavast-Kooy AJ, Krekels GA, et al. Adjuvant cytokeratin staining in Mohs micrographic surgery for basal cell carcinoma. Dermatol Surg. 2003 Apr;29(4):375-7. http://www.ncbi.nlm.nih.gov/pubmed/12656816?tool=bestpractice.com Recurrence rates with Mohs surgery are very low (2% to 5%).[42]Nasr I, McGrath EJ, Harwood CA, et al; British Association of Dermatologists' Clinical Standards Unit. British Association of Dermatologists guidelines for the management of adults with basal cell carcinoma 2021. Br J Dermatol. 2021 Nov;185(5):899-920. https://onlinelibrary.wiley.com/doi/10.1111/bjd.20524 http://www.ncbi.nlm.nih.gov/pubmed/34050920?tool=bestpractice.com [79]Garcia C, Poletti E, Crowson AN. Basosquamous carcinoma. J Am Acad Dermatol. 2009 Jan;60(1):137-43. http://www.ncbi.nlm.nih.gov/pubmed/19103364?tool=bestpractice.com
Conventional surgical treatment (also referred to as standard excision) of basal cell carcinomas, especially if carried out by a dermatologist, nearly always results in complete cure.[91]Bogelund FS, Philipsen PA, Gniadecki R. Factors affecting the recurrence rate of basal cell carcinoma. Acta Derm Venereol. 2007;87(4):330-4. http://www.ncbi.nlm.nih.gov/pubmed/17598036?tool=bestpractice.com Adverse effects include wound dehiscence and excessive scarring, as well as infections. Most of the adverse effects are relatively minor and can be relieved by medication.[62]Neville JA, Welch E, Leffell DJ. Management of nonmelanoma skin cancer in 2007. Nat Clin Pract Oncol. 2007 Aug;4(8):462-9. http://www.ncbi.nlm.nih.gov/pubmed/17657251?tool=bestpractice.com
BCC, regardless of the histological growth pattern, is characterised by asymmetric subclinical extension beyond the clinically visible tumour. To ensure complete removal with histologically negative margins, standard excision must include a margin of clinically normal-appearing skin.[48]Kim JYS, Kozlow JH, Mittal B, et al; Work Group, Invited Reviewers. Guidelines of care for the management of basal cell carcinoma. J Am Acad Dermatol. 2018 Mar;78(3):540-59. https://www.jaad.org/article/S0190-9622(17)32529-X/fulltext http://www.ncbi.nlm.nih.gov/pubmed/29331385?tool=bestpractice.com [63]Drucker AM, Adam GP, Rofeberg V, et al. Treatments of primary basal cell carcinoma of the skin: a systematic review and network meta-analysis. Ann Intern Med. 2018 Oct 2;169(7):456-66. https://www.acpjournals.org/doi/10.7326/M18-0678 http://www.ncbi.nlm.nih.gov/pubmed/30242379?tool=bestpractice.com Excision with 4 mm clinical margins should result in complete removal in more than 95% of cases.[44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1 [64]Wolf DJ, Zitelli JA. Surgical margins for basal cell carcinoma. Arch Dermatol. 1987 Mar;123(3):340-4. http://www.ncbi.nlm.nih.gov/pubmed/3813602?tool=bestpractice.com Five-year recurrence rates are typically ≤5% following standard surgical excision, pending histological subtype.[59]Thomson J, Hogan S, Leonardi-Bee J, et al. Interventions for basal cell carcinoma of the skin. Cochrane Database Syst Rev. 2020 Nov 17;(11):CD003412. https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD003412.pub3/full http://www.ncbi.nlm.nih.gov/pubmed/33202063?tool=bestpractice.com
Care should be taken (by a pathologist) to ink all of the margins of the excisional specimen, and to evaluate for presence of the characteristic stroma of BCC at the tissue edges (margins). If such a stroma is seen at the margin, recurrence is still a possibility, as superficial components of BCC may exhibit so-called skip areas in the biopsy specimen.
radiotherapy
Additional treatment recommended for SOME patients in selected patient group
Radiotherapy may be used as an adjuvant treatment for patients with positive margins after resection or nerve invasion.[44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1
radiotherapy
Radiotherapy is a suitable alternative to surgery when either the patient or the tumours are not amenable to surgery due to functional or cosmetic concerns, the patient's general health, or patient preference.[84]Hoashi T, Ishikawa M, Uehara J, et al. Japanese Dermatological Association guidelines: outlines of Japanese clinical guidelines for basal cell carcinoma 2021. J Dermatol. 24 Jan 2024 [Epub ahead of print]. https://onlinelibrary.wiley.com/doi/10.1111/1346-8138.16944 http://www.ncbi.nlm.nih.gov/pubmed/38264942?tool=bestpractice.com [85]Kinj R, Gaide O, Jeanneret-Sozzi W, et al. Randomized phase II selection trial of FLASH and conventional radiotherapy for patients with localized cutaneous squamous cell carcinoma or basal cell carcinoma: a study protocol. Clin Transl Radiat Oncol. 2024 Mar;45:100743. https://www.ctro.science/article/S2405-6308(24)00020-X/fulltext http://www.ncbi.nlm.nih.gov/pubmed/38362466?tool=bestpractice.com The feasibility of radiotherapy for advanced disease should be determined by a radiation oncologist.[44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1
Hedgehog pathway inhibitor or cemiplimab
For patients who experience recurrence following surgery, or who are not candidates for surgery or radiotherapy, the hedgehog pathway inhibitors vismodegib and sonidegib are recommended as potential treatments for locally advanced basal cell carcinoma (BCC).[44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1 Frequently, hedgehog pathway inhibitors are associated with serious adverse effects such as muscle spasms, alopecia, taste loss, weight loss, decreased appetite, fatigue, nausea, and diarrhoea. Drug holidays or other alternatives to daily dosing can be used to improve adherence to therapy and quality of life.[44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1
In the ERIVANCE study, investigator-assessed objective response rates among patients treated with vismodegib for locally advanced BCC and metastatic BCC were 60.3% and 48.5%, respectively.[86]Sekulic A, Migden MR, Basset-Seguin N, et al; ERIVANCE BCC Investigators. Long-term safety and efficacy of vismodegib in patients with advanced basal cell carcinoma: final update of the pivotal ERIVANCE BCC study. BMC Cancer. 2017 May 16;17(1):332. https://bmccancer.biomedcentral.com/articles/10.1186/s12885-017-3286-5 http://www.ncbi.nlm.nih.gov/pubmed/28511673?tool=bestpractice.com Median overall survival and progression‐free survival for patients with metastatic BCC treated with vismodegib were 33.4 months and 9.3 months, respectively.[86]Sekulic A, Migden MR, Basset-Seguin N, et al; ERIVANCE BCC Investigators. Long-term safety and efficacy of vismodegib in patients with advanced basal cell carcinoma: final update of the pivotal ERIVANCE BCC study. BMC Cancer. 2017 May 16;17(1):332. https://bmccancer.biomedcentral.com/articles/10.1186/s12885-017-3286-5 http://www.ncbi.nlm.nih.gov/pubmed/28511673?tool=bestpractice.com In another open-label study, median progression-free survival of vismodegib-treated patients with metastatic BCC was 13.1 months.[87]Basset-Séguin N, Hauschild A, Kunstfeld R, et al. Vismodegib in patients with advanced basal cell carcinoma: primary analysis of STEVIE, an international, open-label trial. Eur J Cancer. 2017 Nov;86:334-48. https://www.ejcancer.com/article/S0959-8049(17)31247-9/fulltext http://www.ncbi.nlm.nih.gov/pubmed/29073584?tool=bestpractice.com With 30 months of follow-up, a randomised double-blind study of sonidegib in patients with locally advanced and metastatic BCC reported central (blinded independent) objective response rates of 56.1% in locally advanced BCC and 7.7% in metastatic BCC.[88]Lear JT, Migden MR, Lewis KD, et al. Long-term efficacy and safety of sonidegib in patients with locally advanced and metastatic basal cell carcinoma: 30-month analysis of the randomized phase 2 BOLT study. J Eur Acad Dermatol Venereol. 2018 Mar;32(3):372-81. https://onlinelibrary.wiley.com/doi/full/10.1111/jdv.14542 http://www.ncbi.nlm.nih.gov/pubmed/28846163?tool=bestpractice.com A median progression-free survival of 13.1 months was reported among patients with metastatic BCC.[88]Lear JT, Migden MR, Lewis KD, et al. Long-term efficacy and safety of sonidegib in patients with locally advanced and metastatic basal cell carcinoma: 30-month analysis of the randomized phase 2 BOLT study. J Eur Acad Dermatol Venereol. 2018 Mar;32(3):372-81. https://onlinelibrary.wiley.com/doi/full/10.1111/jdv.14542 http://www.ncbi.nlm.nih.gov/pubmed/28846163?tool=bestpractice.com
Cemiplimab, a recombinant human immunoglobulin G4 monoclonal antibody that binds to programmed death receptor-1 (PD-1), is recommended for patients with recurrent locally advanced disease who have previously been treated with, or are intolerant to, hedgehog pathway inhibitors.[44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1 One phase 2 open-label, multicentre, non-randomised trial of cemiplimab in patients with metastatic or locally advanced BCC, who had progressed on hedgehog pathway inhibitors or achieved no better than stable disease after 9 months, or were intolerant to hedgehog pathway inhibitor therapy, reported an objective response (independent central review) in 31% of patients (26 of 84; median duration of follow-up 15 months).[90]Stratigos AJ, Sekulic A, Peris K, et al. Cemiplimab in locally advanced basal cell carcinoma after hedgehog inhibitor therapy: an open-label, multi-centre, single-arm, phase 2 trial. Lancet Oncol. 2021 Jun;22(6):848-57. http://www.ncbi.nlm.nih.gov/pubmed/34000246?tool=bestpractice.com Serious treatment-emergent adverse events were reported in 29 patients (35%).[90]Stratigos AJ, Sekulic A, Peris K, et al. Cemiplimab in locally advanced basal cell carcinoma after hedgehog inhibitor therapy: an open-label, multi-centre, single-arm, phase 2 trial. Lancet Oncol. 2021 Jun;22(6):848-57. http://www.ncbi.nlm.nih.gov/pubmed/34000246?tool=bestpractice.com
Primary options
vismodegib: consult specialist for guidance on dose
OR
sonidegib: consult specialist for guidance on dose
Secondary options
cemiplimab: consult specialist for guidance on dose
surgery
Mohs surgery is a variant of dermatological surgery in which the practitioner examines margins via intraoperative consultation (ex tempore, frozen section) while the patient's site of procedure is still open. It is recommended for high-risk basal cell carcinoma (BCC; e.g., large morpheaform BCC, and BCC with poorly defined clinical margins) and for the excision of low-risk BCC after positive margins with standard excision.[42]Nasr I, McGrath EJ, Harwood CA, et al; British Association of Dermatologists' Clinical Standards Unit. British Association of Dermatologists guidelines for the management of adults with basal cell carcinoma 2021. Br J Dermatol. 2021 Nov;185(5):899-920. https://onlinelibrary.wiley.com/doi/10.1111/bjd.20524 http://www.ncbi.nlm.nih.gov/pubmed/34050920?tool=bestpractice.com [44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1 [47]Newlands C, Currie R, Memon A, et al. Non-melanoma skin cancer: United Kingdom National Multidisciplinary Guidelines. J Laryngol Otol. 2016 May;130(S2):S125-32. https://www.cambridge.org/core/journals/journal-of-laryngology-and-otology/article/nonmelanoma-skin-cancer-united-kingdom-national-multidisciplinary-guidelines/EC5EF7B3A87F26984E49F02239E1AD31 http://www.ncbi.nlm.nih.gov/pubmed/27841126?tool=bestpractice.com [49]Stulberg D, Crandell B, Fawcett RS. Diagnosis and treatment of basal cell and squamous cell carcinomas. Am Fam Physician. 2004 Oct 15;70(8):1481-8. http://www.ncbi.nlm.nih.gov/pubmed/15526735?tool=bestpractice.com
Mohs surgery is a tissue-sparing technique that is often utilised in the facial and other cosmetically sensitive regions; scars are smaller than those of conventional surgery, and tissue defects are easier to repair.[53]Smeets NW, Stavast-Kooy AJ, Krekels GA, et al. Adjuvant cytokeratin staining in Mohs micrographic surgery for basal cell carcinoma. Dermatol Surg. 2003 Apr;29(4):375-7. http://www.ncbi.nlm.nih.gov/pubmed/12656816?tool=bestpractice.com Recurrence rates with Mohs surgery are very low (2% to 5%).[42]Nasr I, McGrath EJ, Harwood CA, et al; British Association of Dermatologists' Clinical Standards Unit. British Association of Dermatologists guidelines for the management of adults with basal cell carcinoma 2021. Br J Dermatol. 2021 Nov;185(5):899-920. https://onlinelibrary.wiley.com/doi/10.1111/bjd.20524 http://www.ncbi.nlm.nih.gov/pubmed/34050920?tool=bestpractice.com [79]Garcia C, Poletti E, Crowson AN. Basosquamous carcinoma. J Am Acad Dermatol. 2009 Jan;60(1):137-43. http://www.ncbi.nlm.nih.gov/pubmed/19103364?tool=bestpractice.com
Conventional surgical treatment (also referred to as standard excision) of basal cell carcinomas, especially if carried out by a dermatologist, nearly always results in complete cure.[91]Bogelund FS, Philipsen PA, Gniadecki R. Factors affecting the recurrence rate of basal cell carcinoma. Acta Derm Venereol. 2007;87(4):330-4. http://www.ncbi.nlm.nih.gov/pubmed/17598036?tool=bestpractice.com Adverse effects include wound dehiscence and excessive scarring, as well as infections. Most of the adverse effects are relatively minor and can be relieved by medication.[62]Neville JA, Welch E, Leffell DJ. Management of nonmelanoma skin cancer in 2007. Nat Clin Pract Oncol. 2007 Aug;4(8):462-9. http://www.ncbi.nlm.nih.gov/pubmed/17657251?tool=bestpractice.com
BCC, regardless of the histological growth pattern, is characterised by asymmetric subclinical extension beyond the clinically visible tumour. To ensure complete removal with histologically negative margins, standard excision must include a margin of clinically normal-appearing skin.[48]Kim JYS, Kozlow JH, Mittal B, et al; Work Group, Invited Reviewers. Guidelines of care for the management of basal cell carcinoma. J Am Acad Dermatol. 2018 Mar;78(3):540-59. https://www.jaad.org/article/S0190-9622(17)32529-X/fulltext http://www.ncbi.nlm.nih.gov/pubmed/29331385?tool=bestpractice.com [63]Drucker AM, Adam GP, Rofeberg V, et al. Treatments of primary basal cell carcinoma of the skin: a systematic review and network meta-analysis. Ann Intern Med. 2018 Oct 2;169(7):456-66. https://www.acpjournals.org/doi/10.7326/M18-0678 http://www.ncbi.nlm.nih.gov/pubmed/30242379?tool=bestpractice.com Excision with 4 mm clinical margins should result in complete removal in more than 95% of cases.[44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1 [64]Wolf DJ, Zitelli JA. Surgical margins for basal cell carcinoma. Arch Dermatol. 1987 Mar;123(3):340-4. http://www.ncbi.nlm.nih.gov/pubmed/3813602?tool=bestpractice.com Five-year recurrence rates are typically ≤5% following standard surgical excision, pending histological subtype.[59]Thomson J, Hogan S, Leonardi-Bee J, et al. Interventions for basal cell carcinoma of the skin. Cochrane Database Syst Rev. 2020 Nov 17;(11):CD003412. https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD003412.pub3/full http://www.ncbi.nlm.nih.gov/pubmed/33202063?tool=bestpractice.com
Care should be taken (by a pathologist) to ink all of the margins of the excisional specimen, and to evaluate for presence of the characteristic stroma of BCC at the tissue edges (margins). If such a stroma is seen at the margin, recurrence is still a possibility, as superficial components of BCC may exhibit so-called skip areas in the biopsy specimen.
radiotherapy
Additional treatment recommended for SOME patients in selected patient group
Radiotherapy may be used as an adjuvant treatment for patients with positive margins after resection or nerve invasion.[44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1
radiotherapy
Radiotherapy is a suitable alternative to surgery when either the patient or the tumours are not amenable to surgery due to functional or cosmetic concerns, the patient's general health, or patient preference.[84]Hoashi T, Ishikawa M, Uehara J, et al. Japanese Dermatological Association guidelines: outlines of Japanese clinical guidelines for basal cell carcinoma 2021. J Dermatol. 24 Jan 2024 [Epub ahead of print]. https://onlinelibrary.wiley.com/doi/10.1111/1346-8138.16944 http://www.ncbi.nlm.nih.gov/pubmed/38264942?tool=bestpractice.com [85]Kinj R, Gaide O, Jeanneret-Sozzi W, et al. Randomized phase II selection trial of FLASH and conventional radiotherapy for patients with localized cutaneous squamous cell carcinoma or basal cell carcinoma: a study protocol. Clin Transl Radiat Oncol. 2024 Mar;45:100743. https://www.ctro.science/article/S2405-6308(24)00020-X/fulltext http://www.ncbi.nlm.nih.gov/pubmed/38362466?tool=bestpractice.com The feasibility of radiotherapy for advanced disease should be determined by a radiation oncologist.[44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1
hedgehog pathway inhibitor or cemiplimab
For patients who experience recurrence following surgery, or who are not candidates for surgery or radiotherapy, the hedgehog pathway inhibitors vismodegib and sonidegib are recommended as potential treatments for nodal disease.[44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1 Frequently, hedgehog pathway inhibitors are associated with serious adverse effects such as muscle spasms, alopecia, taste loss, weight loss, decreased appetite, fatigue, nausea, and diarrhoea. Drug holidays or other alternatives to daily dosing can be used to improve adherence to therapy and quality of life.[44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1
Cemiplimab, a recombinant human immunoglobulin G4 monoclonal antibody that binds to programmed death receptor-1 (PD-1), is recommended for patients with nodal disease who have previously been treated with, or are intolerant to, hedgehog pathway inhibitors.[44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1 One phase 2 open-label, multi-centre, non-randomised trial of cemiplimab in patients with metastatic or locally advanced basal cell carcinoma, who had progressed on hedgehog pathway inhibitors or achieved no better than stable disease after 9 months, or were intolerant to hedgehog pathway inhibitor therapy, reported an objective response (independent central review) in 31% of patients (26 of 84; median duration of follow-up 15 months).[90]Stratigos AJ, Sekulic A, Peris K, et al. Cemiplimab in locally advanced basal cell carcinoma after hedgehog inhibitor therapy: an open-label, multi-centre, single-arm, phase 2 trial. Lancet Oncol. 2021 Jun;22(6):848-57. http://www.ncbi.nlm.nih.gov/pubmed/34000246?tool=bestpractice.com Serious treatment-emergent adverse events were reported in 29 patients (35%).[90]Stratigos AJ, Sekulic A, Peris K, et al. Cemiplimab in locally advanced basal cell carcinoma after hedgehog inhibitor therapy: an open-label, multi-centre, single-arm, phase 2 trial. Lancet Oncol. 2021 Jun;22(6):848-57. http://www.ncbi.nlm.nih.gov/pubmed/34000246?tool=bestpractice.com
Primary options
vismodegib: consult specialist for guidance on dose
OR
sonidegib: consult specialist for guidance on dose
Secondary options
cemiplimab: consult specialist for guidance on dose
vismodegib or cemiplimab
For patients who are not candidates for surgery or radiotherapy, the hedgehog pathway inhibitor vismodegib is recommended as a potential treatment for metastatic disease.[44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1 Frequently, hedgehog pathway inhibitors are associated with serious adverse effects such as muscle spasms, alopecia, taste loss, weight loss, decreased appetite, fatigue, nausea, and diarrhoea. Drug holidays or other alternatives to daily dosing can be used to improve adherence to therapy and quality of life.[44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1
Cemiplimab, a recombinant human immunoglobulin G4 monoclonal antibody that binds to programmed death receptor-1 (PD-1), is recommended for patients with metastatic disease who have previously been treated with, or are intolerant to, hedgehog pathway inhibitors.[44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1 One phase 2 open-label, multi-centre, non-randomised trial of cemiplimab in patients with metastatic or locally advanced basal cell carcinoma, who had progressed on hedgehog pathway inhibitors or achieved no better than stable disease after 9 months, or were intolerant to hedgehog pathway inhibitor therapy, reported an objective response (independent central review) in 31% of patients (26 of 84; median duration of follow-up 15 months).[90]Stratigos AJ, Sekulic A, Peris K, et al. Cemiplimab in locally advanced basal cell carcinoma after hedgehog inhibitor therapy: an open-label, multi-centre, single-arm, phase 2 trial. Lancet Oncol. 2021 Jun;22(6):848-57. http://www.ncbi.nlm.nih.gov/pubmed/34000246?tool=bestpractice.com Serious treatment-emergent adverse events were reported in 29 patients (35%).[90]Stratigos AJ, Sekulic A, Peris K, et al. Cemiplimab in locally advanced basal cell carcinoma after hedgehog inhibitor therapy: an open-label, multi-centre, single-arm, phase 2 trial. Lancet Oncol. 2021 Jun;22(6):848-57. http://www.ncbi.nlm.nih.gov/pubmed/34000246?tool=bestpractice.com
Primary options
vismodegib: consult specialist for guidance on dose
Secondary options
cemiplimab: consult specialist for guidance on dose
surgery (limited metastatic disease)
In highly selective circumstances, and with multidisciplinary consultation, resection of limited metastases can be considered.[44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1
Mohs surgery is a variant of dermatological surgery in which the practitioner examines margins via intraoperative consultation (ex tempore, frozen section) while the patient's site of procedure is still open. It is recommended for high-risk basal cell carcinoma (BCC; e.g., large morpheaform BCC, and BCC with poorly defined clinical margins) and for the excision of low-risk BCC after positive margins with standard excision.[42]Nasr I, McGrath EJ, Harwood CA, et al; British Association of Dermatologists' Clinical Standards Unit. British Association of Dermatologists guidelines for the management of adults with basal cell carcinoma 2021. Br J Dermatol. 2021 Nov;185(5):899-920. https://onlinelibrary.wiley.com/doi/10.1111/bjd.20524 http://www.ncbi.nlm.nih.gov/pubmed/34050920?tool=bestpractice.com [44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1 [47]Newlands C, Currie R, Memon A, et al. Non-melanoma skin cancer: United Kingdom National Multidisciplinary Guidelines. J Laryngol Otol. 2016 May;130(S2):S125-32. https://www.cambridge.org/core/journals/journal-of-laryngology-and-otology/article/nonmelanoma-skin-cancer-united-kingdom-national-multidisciplinary-guidelines/EC5EF7B3A87F26984E49F02239E1AD31 http://www.ncbi.nlm.nih.gov/pubmed/27841126?tool=bestpractice.com [49]Stulberg D, Crandell B, Fawcett RS. Diagnosis and treatment of basal cell and squamous cell carcinomas. Am Fam Physician. 2004 Oct 15;70(8):1481-8. http://www.ncbi.nlm.nih.gov/pubmed/15526735?tool=bestpractice.com
Mohs surgery is a tissue-sparing technique that is often utilised in the facial and other cosmetically sensitive regions; scars are smaller than those of conventional surgery, and tissue defects are easier to repair.[53]Smeets NW, Stavast-Kooy AJ, Krekels GA, et al. Adjuvant cytokeratin staining in Mohs micrographic surgery for basal cell carcinoma. Dermatol Surg. 2003 Apr;29(4):375-7. http://www.ncbi.nlm.nih.gov/pubmed/12656816?tool=bestpractice.com Recurrence rates with Mohs surgery are very low (2% to 5%).[42]Nasr I, McGrath EJ, Harwood CA, et al; British Association of Dermatologists' Clinical Standards Unit. British Association of Dermatologists guidelines for the management of adults with basal cell carcinoma 2021. Br J Dermatol. 2021 Nov;185(5):899-920. https://onlinelibrary.wiley.com/doi/10.1111/bjd.20524 http://www.ncbi.nlm.nih.gov/pubmed/34050920?tool=bestpractice.com [79]Garcia C, Poletti E, Crowson AN. Basosquamous carcinoma. J Am Acad Dermatol. 2009 Jan;60(1):137-43. http://www.ncbi.nlm.nih.gov/pubmed/19103364?tool=bestpractice.com
Conventional surgical treatment (also referred to as standard excision) of basal cell carcinomas, especially if carried out by a dermatologist, nearly always results in complete cure.[91]Bogelund FS, Philipsen PA, Gniadecki R. Factors affecting the recurrence rate of basal cell carcinoma. Acta Derm Venereol. 2007;87(4):330-4. http://www.ncbi.nlm.nih.gov/pubmed/17598036?tool=bestpractice.com Adverse effects include wound dehiscence and excessive scarring, as well as infections. Most of the adverse effects are relatively minor and can be relieved by medication.[62]Neville JA, Welch E, Leffell DJ. Management of nonmelanoma skin cancer in 2007. Nat Clin Pract Oncol. 2007 Aug;4(8):462-9. http://www.ncbi.nlm.nih.gov/pubmed/17657251?tool=bestpractice.com
BCC, regardless of the histological growth pattern, is characterised by asymmetric subclinical extension beyond the clinically visible tumour. To ensure complete removal with histologically negative margins, standard excision must include a margin of clinically normal-appearing skin.[48]Kim JYS, Kozlow JH, Mittal B, et al; Work Group, Invited Reviewers. Guidelines of care for the management of basal cell carcinoma. J Am Acad Dermatol. 2018 Mar;78(3):540-59. https://www.jaad.org/article/S0190-9622(17)32529-X/fulltext http://www.ncbi.nlm.nih.gov/pubmed/29331385?tool=bestpractice.com [63]Drucker AM, Adam GP, Rofeberg V, et al. Treatments of primary basal cell carcinoma of the skin: a systematic review and network meta-analysis. Ann Intern Med. 2018 Oct 2;169(7):456-66. https://www.acpjournals.org/doi/10.7326/M18-0678 http://www.ncbi.nlm.nih.gov/pubmed/30242379?tool=bestpractice.com Excision with 4 mm clinical margins should result in complete removal in more than 95% of cases.[44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1 [64]Wolf DJ, Zitelli JA. Surgical margins for basal cell carcinoma. Arch Dermatol. 1987 Mar;123(3):340-4. http://www.ncbi.nlm.nih.gov/pubmed/3813602?tool=bestpractice.com Five-year recurrence rates are typically ≤5% following standard surgical excision, pending histological subtype.[59]Thomson J, Hogan S, Leonardi-Bee J, et al. Interventions for basal cell carcinoma of the skin. Cochrane Database Syst Rev. 2020 Nov 17;(11):CD003412. https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD003412.pub3/full http://www.ncbi.nlm.nih.gov/pubmed/33202063?tool=bestpractice.com
Care should be taken (by a pathologist) to ink all of the margins of the excisional specimen, and to evaluate for presence of the characteristic stroma of BCC at the tissue edges (margins). If such a stroma is seen at the margin, recurrence is still a possibility, as superficial components of BCC may exhibit so-called skip areas in the biopsy specimen.
radiotherapy
Additional treatment recommended for SOME patients in selected patient group
Radiotherapy may be used as an adjuvant treatment for patients with positive margins after resection or nerve invasion.[44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1
radiotherapy
Radiotherapy is a suitable alternative to surgery for patients with limited metastatic disease when either the patient or the tumours are not amenable to surgery due to functional or cosmetic concerns, the patient's general health, or patient preference.[84]Hoashi T, Ishikawa M, Uehara J, et al. Japanese Dermatological Association guidelines: outlines of Japanese clinical guidelines for basal cell carcinoma 2021. J Dermatol. 24 Jan 2024 [Epub ahead of print]. https://onlinelibrary.wiley.com/doi/10.1111/1346-8138.16944 http://www.ncbi.nlm.nih.gov/pubmed/38264942?tool=bestpractice.com [85]Kinj R, Gaide O, Jeanneret-Sozzi W, et al. Randomized phase II selection trial of FLASH and conventional radiotherapy for patients with localized cutaneous squamous cell carcinoma or basal cell carcinoma: a study protocol. Clin Transl Radiat Oncol. 2024 Mar;45:100743. https://www.ctro.science/article/S2405-6308(24)00020-X/fulltext http://www.ncbi.nlm.nih.gov/pubmed/38362466?tool=bestpractice.com The feasibility of radiotherapy for advanced disease should be determined by a radiation oncologist.[44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1
best supportive care
Palliation and best supportive care is recommended for patients with metastatic disease when curative treatment is no longer appropriate.[44]National Comprehensive Cancer Network. NCCN clinical practice guidelines in oncology: basal cell skin cancer [internet publication]. https://www.nccn.org/guidelines/category_1 Palliative care is specialised medical care for people with serious illness that focuses on achieving the best quality of life for both the patient and their family or carers. It provides patients with relief from the symptoms, pain, and the stress of a serious illness. (See Palliative care)
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