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目的:探讨颅内不典型星形细胞瘤的影像学表现。方法:回顾分析经手术病理证实的25例星形细胞瘤CT表现。结果:CT表现于右颞叶皮层区8例,左颞叶皮层区4例,右颞叶、双额叶及左顶叶多发肿瘤1例,脑干4例。小脑半球8例,平扫呈大小不等片状低密度影或囊状影,形态不规则,边缘欠清晰,强化扫描呈不同程度条、片状强化或无强化。结论:胶质瘤CT表现大多具有特征性,部分不典型病例经仔细分析研究CT征象大多能够确诊。
Objective: To investigate the imaging manifestations of atypical astrocytomas in the brain. Methods: The CT findings of 25 cases of astrocytomas confirmed by surgery and pathology were retrospectively analyzed. Results: CT was found in 8 cases of right temporal cortex, 4 cases of left temporal cortex, 1 case of multiple tumors of right temporal, double frontal and left parietal, and 4 cases of brain stem. Cerebellar hemispheres in 8 cases, ranging from flat film showed varying degrees of lamellar low density or cystic shadow, irregular shape, the edge is not clear, enhanced scanning showed varying degrees, flake enhanced or no enhancement. Conclusion: Most of the CT findings of gliomas are characteristic. Some of the atypical cases were diagnosed by careful analysis of CT signs.