The dermatitis seen in pellagra usually affects the dorsal surfaces of the hands and wrists, the neck and parts of the face. In European countries the feet and ankles are frequently affected, but in the United States these areas usually escape. Wood1 cited the following figures for the distribution of cutaneous lesions in pellagra: In 182 cases, or 95.3 per cent, lesions were seen on the backs of the hands. In 36 cases, or 19 per cent, lesions appeared on the neck. In 4 cases, or 2.1 per cent, lesions were noticed on the feet only (all children). Merk2 gave these figures: In 1,679 cases, or 77 per cent, lesions occurred on the backs of the hands. In 282 cases, or 13 per cent, lesions were seen on the backs of the hands and neck. In 164 cases, or 7.5 per cent, lesions appeared on the neck. In