title: [Sinonasal-type haemangiopericytoma: a case report].
abstract: Sinonasal-type hemangiopericytomas, which comprise less than 0.5% of all sinonasal neoplasms, arise unilaterally in the nasal cavity as polypoid masses with a mean diameter of about 3 cm. A 34-year-old female patient was admitted due to nasal obstruction and epistaxis. A polypoid mass covered with intact mucosa that originated both from the right inferior concha and lateral nasal wall was detected by nasal endoscopy. The tumor, extending from the oropharynx to the nasopharynx, was measured as 3,5x3x2 cm. Although exhibiting characteristic histopathological features and typical clinical symptoms, this case with unexpected immunohistochemical findings can provide a viewpoint on the nature of this kind of tumors.
authors.forename: Fazilet
authors.initials: F
authors.lastname: Uğur Duman
authors.forename: Semin
authors.initials: S
authors.lastname: Ayhan
authors.forename: Aydin
authors.initials: A
authors.lastname: İşisağ
authors.forename: Görkem
authors.initials: G
authors.lastname: Eskiizmir
authors.forename: Serdar
authors.initials: S
authors.lastname: Tarhan
mesh_terms: D000328:Adult; D014408:Biomarkers, Tumor / Q000032:analysis; D001706:Biopsy; D004724:Endoscopy; D004844:Epistaxis / Q000209:etiology; D005260:Female; D006393:Hemangiopericytoma / Q000737:chemistry / Q000150:complications / Q000473:pathology*; D006801:Humans; D007150:Immunohistochemistry; D015508:Nasal Obstruction / Q000209:etiology; D010255:Paranasal Sinus Neoplasms / Q000737:chemistry / Q000150:complications / Q000473:pathology*
chemical_list: D014408:Biomarkers, Tumor