Pruritic rash and nocturnal itching
UV light illuminated the patient’s diagnosis.
A 62-YEAR-OLD HISPANIC WOMAN with a history of well-controlled diabetes and hypertension presented with an intensely pruritic rash of 3 months’ duration. She reported poor sleep due to scratching throughout the night. She denied close contact with individuals with similar rashes or itching, new intimate partners, or recent travel. She worked in an office setting and had stable, noncrowded housing.
A physical exam revealed brown and purple scaly papules and many excoriation marks. The rash was concentrated along clothing lines, around intertriginous areas, and on her ankles, wrists, and the interdigital spaces (FIGURE 1A and 1B).
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