恶性肿瘤脑膜转移的MRI征象分析

目的探讨恶性肿瘤脑膜转移的高分辨力MRI影像学特征。方法选择有全身恶性肿瘤病史、临床可疑并经手术病理或脑脊液检查证实的脑膜转移瘤患者90例。回顾性分析脑膜转移瘤的MRI分布、形态、信号特征及其强化的模式。结果本组脑膜转移瘤病例90例,在MRI平扫影像上得以显示者19例。其中,11例的分布类型表现为软脑膜型,占12.22%;8例的分布类型表现为硬脑膜型,占8.89%。在MRI增强扫描影像上90例病变均得以显示。其中,32例的分布类型表现为软脑膜型,占35.55%;48例的分布类型表现为硬脑膜型,占53.33%;10例的分布类型表现为全脑膜型,占11.11%。结论 MRI增强扫描在全身脏器恶性肿瘤脑膜转移瘤的诊断、分型和治疗指导方面,具有突出的应用价值。

Objective To reveal the image characters of meningeal metastases from malignant tumors in high resolution MRI. Methods There were 90 cases with meningeal metastases from whole-body malignant tumors proved by the pathological findings or cerebrospinal fluid examinations. The distributions, shapes of the meningeal metastases and those characters of signals and enhanced modes were analyzed. Results There were all 90 cases shown in plain scan MRI, including 11cases （12.22%） named cerebral pia mater mode and 8 cases （8.89%） named cerebral dura mater mode. There were all 90 cases shown in enhanced scan MRI, including 32 cases （35.55%） named cerebral pia mater mode,48 cases （53.33%） named cerebral dura mater mode and 10 cases （11.11%） named whole-mater mode. Conclusion It was useful to diagnose meningeal metastase, appraise its mode and direct its treatment by enhanced MRI.