September 14th 2005An 11-year-old boy presented to the hospital with a 3-day history of maculopapular rash over the face, trunk, and extremities. He had completed a 5-day course of trimethoprim-sulfamethoxazole for otitis media 1 week before presentation. His medical history was otherwise unremarkable. Over the past 3 days, the rash had become pruritic and the lesions progressively larger. Some lesions were vesicular and bullous. There was diffuse involvement of the oral mucosa, conjunctivae, and genitalia.
