title: Hemangiopericytoma of the nasal cavity: electron-optic study and clinical correlations.
abstract: A case of a hemangiopericytoma of the nasal cavity in a 79-year-old woman is presented. Ultrastructural examination confirmed the pericytic origin of the tumor. Most of the reported hemangiopericytomas of the sinonasal tract are histologically low-grade and their biologic course is in concert with their appearance.
mesh_terms: D000368:Aged; D005260:Female; D006393:Hemangiopericytoma / Q000648:ultrastructure*; D006801:Humans; D009296:Nasal Cavity / Q000648:ultrastructure; D009364:Neoplasm Recurrence, Local; D009669:Nose Neoplasms / Q000648:ultrastructure*