Clinical Challenge: Red, Itchy Rash of the Upper Body

A 50-year-old man is referred for evaluation of a rash first noted approximately 2 months ago. He states that the rash is itchy and is accentuated by rubbing and applying pressure. Despite a 2-week course of cetirizine, the condition has not improved. The patient is currently prescribed a thiazide diuretic to control his hypertension. Examination…