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目的探讨原发性颅内淋巴瘤的影像特征。方法回顾性分析15例经病理证实的原发性颅内淋巴瘤CT和MR I表现。结果 15例中瘤灶23个,单发11例,多发4例;其中脑表面9个,室管膜旁8个,脑深部6个。CT检出18个病灶,检出率83.9%。CT表现呈等或稍高密度,11个密度均匀,7个密度不均。MRI检出所有23个病灶,检出率100%。肿瘤MRI表现T1WI信号略低于灰质,T2WI信号与灰质相似,15个信号均匀,8个信号不均。70.6%瘤灶表现为明显实质样强化,16.1%病灶伴脑膜或室管膜强化。占位效应以及瘤周水肿程度大多数为轻到中度。结论大多数原发性颅内淋巴瘤有一定的影像学特征,少数不典型者鉴别困难。
Objective To investigate the imaging features of primary intracranial lymphomas. Methods Retrospective analysis of 15 cases of pathologically confirmed primary intracranial lymphoma CT and MR I performance. Results Twenty-three tumors were found in 15 cases, 11 cases were single and 4 cases were multiple. Among them, there were 9 brain surfaces, 8 adjacent to ependymal membrane and 6 deep brain. CT detected 18 lesions, the detection rate of 83.9%. CT showed equal or slightly higher density, 11 uniform density, uneven density 7. MRI detected all 23 lesions, the detection rate of 100%. Tumor MRI showed T1WI signal slightly lower than the gray matter, T2WI signal similar to gray matter, 15 uniform signal, 8 signal uneven. 70.6% tumor showed significant enhancement of the real sample, 16.1% of lesions with meningeal or ependymal enhancement. The mass effect and the degree of peritumoral edema are mostly mild to moderate. Conclusion Most of the primary intracranial lymphomas have some imaging features, and the identification of a few atypical cases is difficult.