title: Hyperpigmentation on the thumb with a clinical resemblance to malignant melanoma caused by chronic irritation due to sewing.
authors.forename: N
authors.initials: N
authors.lastname: Nakai
authors.forename: N
authors.initials: N
authors.lastname: Katoh
authors.forename: S
authors.initials: S
authors.lastname: Kishimoto
mesh_terms: D000368:Aged; D003937:Diagnosis, Differential; D005260:Female; D006229:Hand Dermatoses / Q000175:diagnosis*; D006801:Humans; D017495:Hyperpigmentation / Q000175:diagnosis*; D008545:Melanoma / Q000175:diagnosis*; D009784:Occupational Diseases / Q000175:diagnosis*; D012878:Skin Neoplasms / Q000175:diagnosis*; D013933:Thumb / Q000473:pathology