In 10 cases a tumor specimen was obtained either by open surgery or stereotactic biopsy, securing the diagnosis of pilocytic astrocytoma in five patients and nonpilocytic astrocytoma in five others.

• 10例的肿瘤标本通过开放手术或立体定向的活检获得，得出的诊断是：5例毛细胞性星形细胞瘤，5例为非毛细胞性星形细胞瘤。