title: Intracranial hemangiopericytoma: radiology, surgery, radiotherapy, and outcome in 21 patients.
abstract: At operation, 21 meningeal intracranial hemangiopericytomas resembled meningiomas, but differed histologically. They were frequently attached to sinuses, occipitally located, bled profusely at operation, and had a higher risk of recurrence and metastasis. Specific preoperative diagnosis is possible: computed tomography scan showed a meningiomalike tumor, which on the angiogram looked malignant and highly vascular. Two tumors showed a malignant growth pattern on computed tomography scan, "mushrooming." After a radical removal, three patients have lived for more than 10 years without recurrence; two of them were irradiated postoperatively. Three recurrent tumors were treated with radiotherapy only; one responded favorably.
mesh_terms: D000293:Adolescent; D000328:Adult; D002533:Cerebral Angiography; D005069:Evaluation Studies as Topic; D005260:Female; D006393:Hemangiopericytoma / Q000000981:diagnostic imaging* / Q000473:pathology / Q000532:radiotherapy / Q000601:surgery; D006801:Humans; D008297:Male; D008577:Meningeal Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology / Q000532:radiotherapy / Q000601:surgery; D008875:Middle Aged; D009362:Neoplasm Metastasis; D014057:Tomography, X-Ray Computed