title: Subungual extraskeletal chondroma with finger nail deformity: case report.
abstract: We report a subungual extraskeletal chondroma with a convex nail deformity originating from the index finger in a 39-year-old man. The tumor was excised and its histopathology showed obvious nuclear pleomorphism. However, the Ki-67 (MIB-1) labeling index was less than 1%, indicating low proliferative activity; it was classified as an extraskeletal chondroma with atypical features. There was no recurrence over a 3-year postoperative period.
authors.affiliation: Department of Orthopaedic Surgery, Tokai University Hachioji Hospital, Tokyo, Japan.
authors.forename: Takayuki
authors.initials: T
authors.lastname: Ishii
authors.forename: Masayoshi
authors.initials: M
authors.lastname: Ikeda
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Oka
mesh_terms: D000328:Adult; D001707:Biopsy, Needle; D002812:Chondroma / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D005500:Follow-Up Studies; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D009260:Nail Diseases / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D009262:Nails; D009264:Nails, Malformed / Q000175:diagnosis* / Q000601:surgery; D011859:Radiography; D035583:Rare Diseases; D018570:Risk Assessment; D012878:Skin Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D016896:Treatment Outcome