title: Dark-violaceous lesions on the dorsa of both hands.
authors: Department of Dermatology, Hokkaido University Graduate School of Medicine, Kita-ku, Japan.
authors: S
authors: S
authors: Kitamura
authors: Department of Dermatology, Hokkaido University Graduate School of Medicine, Kita-ku, Japan.
authors: H
authors: H
authors: Hata
authors: Department of Dermatology, Hokkaido University Graduate School of Medicine, Kita-ku, Japan.
authors: H
authors: H
authors: Shimizu
mesh_terms: D000369:Aged, 80 and over; D003937:Diagnosis, Differential; D005743:Gastrectomy / Q000009:adverse effects; D006229:Hand Dermatoses / Q000473:pathology*; D006801:Humans; D008297:Male; D010383:Pellagra / Q000473:pathology*