“…Additional therapy, such as dapsone, sulfonamides, corticosteroids, colchicine, tetracyclines, and nicotinamide, may be required. 1,6,10 A presumptive clinical diagnosis of annular pustular psoriasis was supported by the annular lesion morphology, formation of pustules, centrifugal expansion, and potential koebnerization; however, pustular psoriasis was unlikely given the DIF positivity and histologic findings. Bullous tinea is a clinical mimicker, and 2 cases have described basement membrane DIF positivity.…”