Case 2

A 50-year-old woman presents to the dermatology clinic with a 1-day history of an itchy, pink rash that began on her abdomen and quickly spread to her back, arms, and legs. She reports just finishing a 7-day course of trimethoprim-sulfamethoxazole for an uncomplicated urinary tract infection. On physical examination, she is afebrile and has diffuse, fine, erythematous papules that coalesce into plaques in some areas. The rash is symmetrically distributed on the back and chest, largely sparing the face. Her throat and sclerae are clear, and she has no facial edema or lymphadenopathy.

Can you diagnose the condition in Case 2?

A. Cytomegalovirus
B. Epstein-Barr virus
C. Morbilliform drug eruption
D. Scarlet fever

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