This lesion developed on the chest of a 35-year-old man during treatment for a respiratory tract infection. What is the diagnosis?
Answer D. Fixed drug eruptionFixed drug eruptions such as this one are common, immune-mediated, cutaneous lesions that appear as annular, edematous, reddish-brown macules or plaques. Residual hyperpigmentation is a hallmark.
Acute urticaria
Drug-induced pemphigus
Erythema annulare
Fixed drug eruption
Infection