title: Rudimentary polydactyly.
abstract: A case of rudimentary polydactyly on the radial aspect of the thumb of a 4-year-old male was examined. Histologic examination revealed hyperkeratosis and acanthosis in the epidermis and large numbers of nerve bundles in the dermis. With immunoperoxidase staining for S-100 protein, the nerve corpuscles were positively stained. We think that rudimentary polydactyly is a kind of congenital traumatic neuroma and that the possible cause may be intrauterine amputation.
authors.affiliation: Department of Dermatology, Yonsei University Wonju College of Medicine, Wonju, Korea.
authors.forename: J
authors.initials: J
authors.lastname: Chung
authors.forename: I W
authors.initials: IW
authors.lastname: Nam
authors.forename: S K
authors.initials: SK
authors.lastname: Ahn
authors.forename: S H
authors.initials: SH
authors.lastname: Lee
authors.forename: J G
authors.initials: JG
authors.lastname: Kim
authors.forename: Y O
authors.initials: YO
authors.lastname: Sung
mesh_terms: D002675:Child, Preschool; D006801:Humans; D008297:Male; D017689:Polydactyly / Q000473:pathology*; D012867:Skin / Q000473:pathology; D013933:Thumb / Q000473:pathology