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目的 探讨脑转移瘤的CT征象及规律。方法 回顾分析 36例脑转移瘤的CT表现。结果 幕上脑转移瘤 2 5例 ,幕下 11例 ,形态表现多样 ;单发 15例 ,多发 2 1例 ;瘤周水肿大多明显 ,可见“小结节指状水肿”征象 ,多明显均一或环状强化。结论 脑转移瘤好发于幕上 ,多位于大脑半球皮质或皮质下区 ;多发性脑转移瘤多于单发 ,且具有“多形性”特征 ,而单发性多为类圆形等或低密度病灶 ;瘤周水肿明显 ,且有肿瘤与水肿程度不成比例的特征 ;少数脑转移瘤有特殊CT表现。
Objective To investigate the CT signs and laws of brain metastases. Methods The CT findings of 36 cases of brain metastases were retrospectively analyzed. Results The supratentorial brain metastases in 25 cases, 11 cases under the screen, the morphological diversity; single in 15 cases, 21 cases multiple; peritumoral edema mostly obvious, visible “small nodular edema” sign, and more obvious uniform or ring Strengthen the shape. Conclusions Brain metastases occur mainly in the supratentorial cortex, mostly in the cortex or subcortex of the cerebral hemispheres. Multiple brain metastases are more often than single ones and have “pleomorphic” features, whereas solitary ones are mostly round or the like Low-density lesions; peritumoral edema was obvious, and there is a disproportionate degree of tumor and edema characteristics; a few brain metastases have a special CT findings.