原发性中枢神经系统淋巴瘤MRI诊断

[目的]探讨原发性脑内中枢神经系统淋巴瘤的传统MRI及弥散加权成像（DWI）影像学特征。[方法]回顾性分析21例经病理证实的脑内原发性淋巴瘤的MRI影像学表现,10例进行了传统MRI平扫、增强及DWI扫描。11例仅进行了常规MRI扫描。[结果]21例患者单发肿瘤15例（71.40%）,多发肿瘤6例（28.6%）,共31个病灶,27个病灶位于大脑（87.1%）,3个位于小脑（9.7%）,1个位于下丘脑（3.2%）。病灶T1WI、T2WI信号与脑灰质相近。所有病灶都有占位效应,水肿程度不一。所有病灶都呈明显强化,囊变区无强化。7个病灶（22.6%）中心见裂隙状低信号影,周围呈环带状明显强化区。10例共13个病灶进行了DWI扫描,所有病灶在DWI图像呈明显高信号,ADC图呈低信号。[结论]脑内淋巴瘤MRI表现具有一定特征性,结合传统MRI及DWI检查有助于该疾病的明确诊断。

MRI diagnosis of primary intracerebral malignant lymphoma

[Objective] To investigate conventional MRI and diffusion-weighted MR images(DWI) features of primary intracerebral lymphoma. [Methods] MR images were reviewed retrospectively in 21 patients with pathologically proved primary intra-cerebral lymphoma.Both conventional plain and contrast MRI and DWI scanning were performed in 10 patients,while only conventional MRI scanning was performed in 11 patients.[Results] A total of 31 lesions were present in 21 patients;6 patients(28.6%) had multiple lesions.27(87.1%)...