title: Two kinds of Hutchinson's sign, benign and malignant.
abstract: We examined 6 subungual melanomas in situ and 18 melanocytic nevi and compared pigmentation of the nail plates and hyponychium with the use of a dermatoscope. Hutchinson's sign on the hyponychium was not always evidence of subungual melanoma because it can be seen in both diseases. However, there was a wide difference in their dermatoscopic features. We believe that observation of pigmentation on the hyponychium with the use of a dermatoscope contributes to the precise diagnosis of subungual melanoma.
authors.affiliation: Department of Dermatology, Faculty of Medicine, University of Tokyo, Japan. KAWABATA-der@h.u-tokyo.ac.jp
authors.forename: Y
authors.initials: Y
authors.lastname: Kawabata
authors.forename: K
authors.initials: K
authors.lastname: Ohara
authors.forename: H
authors.initials: H
authors.lastname: Hino
authors.forename: K
authors.initials: K
authors.lastname: Tamaki
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D002675:Child, Preschool; D003937:Diagnosis, Differential; D006801:Humans; D008545:Melanoma / Q000175:diagnosis* / Q000473:pathology; D008875:Middle Aged; D009260:Nail Diseases / Q000175:diagnosis* / Q000473:pathology; D009262:Nails / Q000473:pathology*; D009508:Nevus, Pigmented / Q000175:diagnosis* / Q000473:pathology; D012878:Skin Neoplasms / Q000175:diagnosis* / Q000473:pathology