title: Sinonasal hemangiopericytomas: clinicopathologic and imaging findings.
abstract: Hemangiopericytomas are rare soft-tissue neoplastic lesions that can arise in any part of the body. They are mesenchymal tumors that account for 3 to 5% of all soft-tissue sarcomas and 1% of all vascular tumors. They originate in extravascular cells (pericytes). Some 15 to 30% of all hemangiopericytomas occur in the head and neck; of these, approximately 5% occur in the sinonasal area. We describe our brief retrospective review of 7 histologically proven cases of sinonasal hemangiopericytoma, and we discuss the imaging characteristics and clinical and pathologic findings in these patients.
authors.affiliation: Department of Radiology, Louisiana State University Health Sciences Center, 1542 Tulane Ave., New Orleans, LA 70112, USA. drpalacios@aol.com
authors.forename: Enrique
authors.initials: E
authors.lastname: Palacios
authors.forename: Santiago
authors.initials: S
authors.lastname: Restrepo
authors.forename: Luciano
authors.initials: L
authors.lastname: Mastrogiovanni
authors.forename: Giovanni D
authors.initials: GD
authors.lastname: Lorusso
authors.forename: Rafael
authors.initials: R
authors.lastname: Rojas
mesh_terms: D000328:Adult; D000368:Aged; D004844:Epistaxis / Q000601:surgery; D005260:Female; D006393:Hemangiopericytoma / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009669:Nose Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D010255:Paranasal Sinus Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D011859:Radiography; D012189:Retrospective Studies