title: Chondroma of the cheek: A case report.
abstract: An extremely rare case of soft tissue chondroma occurring in the right cheek of a 47-year-old woman is reported. The localized nodular tumor was encapsulated and composed of hyalinized cartilage with fine calcifications. Most tumor cells were positive for vimentin and S-100 protein, but negative for cytokeratin, factor VIII, and smooth muscle actin. It seems likely that the tumor cells arise from uncommitted mesenchymal stem cells by metaplastic process.
authors.affiliation: Division of Oral Pathology, Department of Oral Medicine and Surgery, Tohoku University Graduate School of Dentistry, Sendai, Japan. onodera@opath.dent.tohoku.ac.jp
authors.forename: K
authors.initials: K
authors.lastname: Onodera
authors.forename: H
authors.initials: H
authors.lastname: Xu
authors.forename: S
authors.initials: S
authors.lastname: Kimizuka
authors.forename: S
authors.initials: S
authors.lastname: Echigo
authors.forename: K
authors.initials: K
authors.lastname: Ooya
mesh_terms: D002610:Cheek / Q000473:pathology*; D002812:Chondroma / Q000473:pathology*; D005260:Female; D006801:Humans; D008875:Middle Aged; D009062:Mouth Neoplasms / Q000473:pathology*