title: Sinonasal hemangiopericytoma.
abstract: Sino-nasal hemangiopericytomas are rare indolent mesenchymal tumors which slowly invade local tissue. Electronmicroscopy and immunohistochemical techniques may be necessary to differentiate hemangiopericytomas from other sarcomatous tumors. Differentiation between malignant and benign tumors poses a difficult task, therefore clinical correlation as well histological confirmation is necessary to establish a diagnosis. Due to the low incidence of distant metastasis and low mortality, surgery consisting of wide local excision is usually curative.
authors.affiliation: Department of Otolaryngology-Head and Neck Surgery, Geisinger Medical Center, Danville, PA 17822.
authors.forename: B
authors.initials: B
authors.lastname: Millman
authors.forename: D
authors.initials: D
authors.lastname: Brett
authors.forename: D P
authors.initials: DP
authors.lastname: Vrabec
mesh_terms: D000368:Aged; D005004:Ethmoid Bone / Q000473:pathology; D005260:Female; D006393:Hemangiopericytoma / Q000000981:diagnostic imaging / Q000473:pathology* / Q000648:ultrastructure; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008443:Maxillary Sinus / Q000473:pathology; D008854:Microscopy, Electron; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D010255:Paranasal Sinus Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology* / Q000648:ultrastructure; D010256:Paranasal Sinuses / Q000000981:diagnostic imaging / Q000473:pathology*; D014057:Tomography, X-Ray Computed