twenty-seven patients were selected for this study , including twelve patients with malignant primary intrinsic tumors histologically consistent with a diagnosis of malignant astrocytoma or glioblastoma multiforme , and fifteen patients with extrinsic tumors diagnosed as meningioma , pituitary adenoma , craniopharygnioma and neurinoma .
C0027651
tumors
C0032000
pituitary adenoma