Percutaneous sclerotherapy with ethanol and sodium morrhuate under ultrasound guidance has been reported with successful results and low recurrence.[27]Fukumoto K, Kojima T, Tomonari H, et al. Ethanol injection sclerotherapy for Baker's cyst, thyroglossal duct cyst, and branchial cleft cyst. Ann Plast Surg. 1994;33:615-9.
http://www.ncbi.nlm.nih.gov/pubmed/7880052?tool=bestpractice.com
[28]Centeno CJ, Schultz J, Freeman M. Sclerotherapy of Baker's cyst with imaging confirmation of resolution. Pain Physician. 2008;11:257-61.
http://www.painphysicianjournal.com/current/pdf?article=OTcz&journal=40
http://www.ncbi.nlm.nih.gov/pubmed/18354718?tool=bestpractice.com
However, these methods are not the standard of care as they are supported by only small series and case reports.