International journal of dermatology
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A 48-year-old alcoholic Filipino man presented to the outpatient department with a 2-year history of an eruption in a photosensitive distribution and episodes of mild diarrhea. He was otherwise in good health. Dermatologic examination revealed a browny-red coloration, with a sharply demarcated erythematous border, affecting both hands and lower forearms, where it was striking in its symmetry (Fig. 1). ⋯ The patient showed no evidence of mental confusion. A clinical diagnosis of pellagra was made based on the morphology, and treatment with nicotinamide 500 mg daily was instituted. The eruption quickly improved and resolved in 2 weeks (Fig. 2).