Tests
1st tests to order
clinical diagnosis
Test
Usually no tests are necessary.
Result
features of rosacea including flushing, papules and pustules, telangiectases, and ocular manifestations
Tests to consider
skin biopsy
Test
These findings are highly nonspecific, typically demonstrating granulomatous disease.
May be performed to exclude more ominous conditions that mimic rosacea, including sarcoidosis, connective tissue disease, and mastocytosis.
Result
nonspecific granulomatous or lymphohistiocytic infiltrate; associated edema, telangiectases, sebaceous hyperplasia, and demodex mites in the hair follicle (increased in number) may be present
antinuclear antibody titer
Test
Perform if systemic lupus erythematosus (SLE) or other connective tissue disease is suspected.
Positive in many forms of connective tissue disease (e.g., SLE >1:160).
Result
negative
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