单发性脑转移瘤的MRI诊断

MRI diagnosis of solitary metastases

目的探讨单发性脑转移瘤的MRI表现及诊断价值。方法回顾性分析32例单发性脑转移瘤的MRI表现。结果32例单发性脑转移瘤中,发生于幕上者25例,其中肿瘤位于皮层及皮层下21例,幕下者7例。轻度水肿8例,中度水肿5例,重度水肿19例。不规则环形增强13例(40.0%),结节形增强6例(18.7%),囊实形增强13例(40.0%)。结论单发脑转移瘤的MRI征象具有一定的特征,MRI是诊断单发脑转移瘤的有效方法。

[Objective] To evaluate MRI manifestation and diagnostic value in solitary brain metastases. [Methods] MRI findings of 32 patients with solitary brain metastases were reviewed retrospectively. [Results] A- mong the 32 cases, 25 lesions were located in supratentorial cerebrum and 21 cases of them were situated in the cortex or subeortex, and 7 lesions were in infra-tentorium. The edema was slight in 9 cases, moderate in 5, serous in 18. The shapes of lesions in contrast-enhanced MRI were inegular ring（40%）, nodule（18.7%）, cysto-kernel type （40%） respectively. [Conclusion] Solitary brain metastases have some characteristic MRI features. MRI, including contrast-enhanced MRI is valuable in finding solitary brain metastases.