title: Intraosseous schwannoma of the ilium.
abstract: We presented a 27-year-old male diagnosed with intraosseous schwannoma of the ilium. Computed tomographic images revealed a well-demarcated, lobulated, expansile, osteolytic lesion in the right supraacetabular region of the ilium. In addition, an intratumoral punctate calcification and a sclerotic rim were observed. T2-weighted magnetic resonance (MR) images demonstrated a heterogeneously hyperintense lesion with a hypointense rim. Major parts of the lesion, excluding some central areas, were enhanced on gadolinium-enhanced MR images. Pathological examination revealed an intraosseous schwannoma. Our findings indicate that intraosseous schwannoma should be considered when images demonstrate a well-demarcated, lobulated, expansile, osteolytic lesion with a sclerotic rim.
authors.affiliation: Department of Radiology, Gifu University School of Medicine, 1-1 Yanagido, Gifu 501-1194, Japan.
authors.forename: Hiroki
authors.initials: H
authors.lastname: Kato
authors.affiliation: Department of Radiology, Gifu University School of Medicine, 1-1 Yanagido, Gifu 501-1194, Japan; High-Level Imaging Diagnosis Center, Gifu University Hospital, 1-1 Yanagido, Gifu 501-1194, Japan. Electronic address: masa_gif@yahoo.co.jp.
authors.forename: Masayuki
authors.initials: M
authors.lastname: Kanematsu
authors.affiliation: Department of Orthopedic Surgery, Gifu University School of Medicine, Gifu, Japan.
authors.forename: Takatoshi
authors.initials: T
authors.lastname: Ohno
authors.affiliation: Department of Orthopedic Surgery, Gifu University School of Medicine, Gifu, Japan.
authors.forename: Koji
authors.initials: K
authors.lastname: Oshima
authors.affiliation: Department of Orthopedic Surgery, Gifu University School of Medicine, Gifu, Japan.
authors.forename: Akihito
authors.initials: A
authors.lastname: Nagano
authors.affiliation: Department of Pathology, Gifu University School of Medicine, Gifu, Japan.
authors.forename: Yuichiro
authors.initials: Y
authors.lastname: Hatano
authors.affiliation: Department of Radiology, Kizawa Memorial Hospital, 590 Shimokobi, Kobi-cho, Minokamo City, Gifu 505-8503, Japan.
authors.forename: Hironori
authors.initials: H
authors.lastname: Nishibori
mesh_terms: D000328:Adult; D001859:Bone Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology; D006801:Humans; D007085:Ilium / Q000000981:diagnostic imaging* / Q000473:pathology; D008279:Magnetic Resonance Imaging; D008297:Male; D009442:Neurilemmoma / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology; D011859:Radiography
keywords: CT; Ilium; Intraosseous schwannoma; MRI