1974～1990年Royol Masden Hospital(RMH)收治111例无组织学证实而推测为大脑胶质瘤的成人(>16岁)行首次放疗。所有病人表现出多种神经学特征后经CT或MRI诊断。41例扫描显示伴有肿块效应并偶见钙化的低密度病灶,这些病灶在静脉增强后不增强(24例)或仅轻微增强至比中脑动脉略低的密度(17例)被推测为低分级胶质瘤(Ⅰ组)。63例扫描显示低、等或高密度肿块,在静脉增强后明显增强,被推测为高分级胶质瘤(Ⅱ组)。3例患者的增 Royol Masden Hospital (RMH) from 1974 to 1990 treated 111 adults without histology confirmed as gliomas (> 16 years) undergoing first-time radiotherapy. All patients showed a variety of neurological features by CT or MRI diagnosis. Forty-one scans showed low-density lesions with mass effect and occasionally calcified lesions that were presumed to be low without enhancement (24) or only slightly higher than those with a slightly lower median cerebral artery (17) Grading glioma (Ⅰ group). Sixty-three patients with low, high, or high-density mass showed a marked enhancement after intravenous injection, suggesting a high-grade glioma (group Ⅱ). 3 patients increased