We report the case of a 19-year-old female patient with a history of anorex
ia nervosa. The patient suffered from a burning, symmetrical and well defin
ed erythematous rash with hyperpigmentation on light-exposed skin areas and
pressure points. The patient's nutritional assessment revealed severe maln
utrition with a low-protein and corn-based diet. The history of vitamin and
protein deficiency, together with the typical cutaneous findings, confirme
d the diagnosis of pellagra. The clinical features and pathogenesis of the
disease are discussed.