原发于舌根部弥漫大B细胞淋巴瘤的MRI特点(附9例报告)

MR characteristics of primary diffuse Large B-cell lymphoma at tongue base

目的：探讨原发于舌根的弥漫大B细胞淋巴瘤的MR影像学特点。方法：回顾性分析经手术或活检病理证实为舌根部大B细胞淋巴瘤的9例患者的术前MR影像资料，主要观察病变的发生部位、形态、大小、信号、边界、累及范围和淋巴结转移情况等。结果：9例患者的主要MRI表现为舌根部黏膜下肿块，呈类圆形（4例）或不规则形（5例），边界清楚，直径2．0～4．5cm，T2WI上呈均匀高信号，增强扫描呈中度均匀强化。邻近的扁桃体受压变形5例，其中3例肿块与扁桃腺分界不清；7例（7／9）有单侧或双侧颈部淋巴结肿大。结论：MRI能很好地显示舌根部弥漫大B细胞淋巴瘤的影像学特征，有助于肿瘤的术前诊断和分期。

Objective： To explore the MR characteristics of primary diffuse large Bcell lymphoma at the base of tongue. Methods：The MRI data of 9 patients with primary diffuse large B-cell lymphoma at the base of tongue were retro- spectively analyzed, the main features of the tumors including site, morphology, size, signal intensity, border and extent were evaluated. Results：The main MRI features of the 9 cases were as follows： submucosal tumor at tongue base,oval （n=4） or irregular （n=4） in shape,well defined margin,diameter of 2.0-4.5cm,homogeneous hyper-intensity on T2WI,and mode- rate homogeneous enhancement. The adjacent tonsil was compressed and deformed in 5 eases,of which the border between the tumor and tonsil was unclear in 3 cases. Unilateral or bilateral enlargement of cervical lymph nodes was noted in 7 （7/9） cases. Conclusion：MRI shows good performance in displaying primary diffuse large B-cell lymphoma at tongue base,and is helpful for preoperative diagnosis and staging.