3Chiechi MV, Smirniotopoulos JG, Mena H. Intracranial hemangiopericytoma: MR and CT features. AJNR, 1996, 17: 1365-1371.
4Guthrie BL, Ebersold MJ, Scheithaner BW, et al. Meningeal hemangiopericytoma: histopathological features, treatment, and long-term follow-up of 44 cases. Neurosurgery,1989, 25: 514-522.
5Mena H, Ribas JL, Pezeshkpour GH. Hemangiopericytoma of the central nervous system: a review of 94 cases. Hum Pathol, 1991, 22: 84-91.
6Middleton LP, Duray PH, Merino MJ. The histological spectrum of Hemangiopericytoma: application of immunohistochemical analysis including proliferative markers to facilitate diagnosis and predict prognosis. Hum Pathol, 1998,29:636-640.
7Ruscalleda J, Feliciani M, Avila A, et al. Neuroradiological features of intracranial and intraorbital meningeal haemangiopericytomas. Neuroradiology, 1994,36:440-445.
9Goellner JR, Laws ER Jr, Soule EH, et al. Hemangiopericytoma of the meninges: Mayo Clinic experience. Am J Clin Pathol, 1978,70:375-380.
10Jaaskelainen J, Servo A, Haltia M, et al. Intracranial hemangiopericytomas: radiology, surgery, radiotherapy, and outcome in 21 patients. Surg Neuol, 1985,23:227-236.
