Hemangiopericytoma of the orbit.
D000328:Adult; D000368:Aged; D002467:Cell Nucleus / Q000648:ultrastructure; D004727:Endothelium / Q000473:pathology; D005260:Female; D005347:Fibroblasts / Q000473:pathology; D005500:Follow-Up Studies; D006393:Hemangiopericytoma / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000209:etiology / Q000473:pathology / Q000601:surgery; D006801:Humans; D008297:Male; D008875:Middle Aged; D009130:Muscle, Smooth / Q000473:pathology; D009364:Neoplasm Recurrence, Local; D009918:Orbital Neoplasms / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000209:etiology / Q000473:pathology / Q000601:surgery; D011859:Radiography; D014463:Ultrasonography