title: Ossifying lipoma independent of bone tissue.
abstract: A 46-year-old Japanese male was referred to a local hospital because of a firm, nontender mass on his neck. On physical examination, the tumor was soft, well demarcated, 3 x 2 cm in size and located in the submucosal region. It was entirely separate from the vertebrae. The resected tumor was shown to be a lipoma with focal ossification. Ossifying lipomas are rare, and the cases which are independent of bone even more so. A literature review revealed that ossifying lipoma independent of bone tissue has been reported in only 8 cases, and, interestingly, all of them occurred in the head and neck region.
authors.affiliation: Division of Diagnostic Pathology, Keio University Hospital, Tokyo, Japan. kameyama@mc.med.keio.ac.jp
authors.forename: K
authors.initials: K
authors.lastname: Kameyama
authors.forename: Y
authors.initials: Y
authors.lastname: Akasaka
authors.forename: H
authors.initials: H
authors.lastname: Miyazaki
authors.forename: J
authors.initials: J
authors.lastname: Hata
mesh_terms: D006258:Head and Neck Neoplasms / Q000150:complications / Q000473:pathology*; D006801:Humans; D008067:Lipoma / Q000150:complications / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D009999:Ossification, Heterotopic / Q000150:complications / Q000473:pathology*