title: MRI of hemangiopericytoma in the sacrum.
abstract: Osseous hemangiopericytoma is rare. We present a case of a 30-year-old woman with low-back pain with radiation to the left buttock for 1 month. Magnetic resonance imaging (MRI) showed a tumor mass with areas of serpentine signal void pattern in the sacrum suggestive of a vascular tumor. Neither calcifications nor layered blood serum were noted. Histological diagnosis was compatible with osseous hemangiopericytoma.
authors.affiliation: School of Medicine, Taipei Medical University, Taipei, Taiwan, Republic of China.
authors.forename: Yu-Wei
authors.initials: YW
authors.lastname: Lian
authors.forename: Min-Szu
authors.initials: MS
authors.lastname: Yao
authors.forename: Shu-Chiang
authors.initials: SC
authors.lastname: Hsieh
authors.forename: Wilson T
authors.initials: WT
authors.lastname: Lao
authors.forename: Chia-Liang
authors.initials: CL
authors.lastname: Fang
authors.forename: Wing P
authors.initials: WP
authors.lastname: Chan
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D005260:Female; D006393:Hemangiopericytoma / Q000175:diagnosis*; D006801:Humans; D008279:Magnetic Resonance Imaging; D012447:Sacrum / Q000473:pathology; D013125:Spinal Neoplasms / Q000175:diagnosis*