BACKGROUND:Hemangiopericytomas (HPCs) are rare tumors in the central nervous system (CNS) and in extra‐CNS sites. The authors of this report used the Surveillance, Epidemiology, and End Results (SEER) Program to study prognostic factors in patients with HPC.
METHODS:The SEER database was analyzed for patients who were diagnosed with HPC tumors from 1973 to 2007. Patients were stratified into CNS...
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