肾周淋巴瘤的CT、MRI诊断价值及鉴别诊断

Diagnostic value and antidiastole of CT and MRI for perirenal lymphoma

目的探讨CT、MRI对肾周淋巴瘤的诊断价值,提高诊断及鉴别诊断的能力。方法回顾性分析19例经临床病理证实的淋巴瘤的CT、MRI表现;从肿瘤的形态、境界、密度/信号改变以及强化程度分析总结。结果 19例均为非霍奇金淋巴瘤。12例行CT检查,4例行MRI检查,3例同时行CT及MRI检查。表现为肾周团块状或条片状软组织肿物,形态不规则或分叶状;境界不清;可侵犯肾脏实质、肾周筋膜、肾上腺,可包绕肾门或腹膜后血管但不侵犯。CT平扫等密度,CT增强后呈轻～中度持续性强化,强化均匀,动脉期CT值上升<20 HU或40 HU。T1WI、T2WI混杂信号或等信号,DWI呈明亮的高信号,MRI增强呈轻～中度持续性强化,强化可均匀或不均匀。结论肾周淋巴瘤具有较为典型的CT、MRI表现,对诊断及鉴别诊断具有重要价值。

Objective To investigate the diagnostic value of CT and MRI to perirenal lymphoma and to enhance the ability of diagnosis and antidiastole.Methods Retrospective analysis was employed to research the characteristic of CT and MRI for 19 patients with perirenal lymphoma confirmed by pathology.The morphous,milieu,change of density / signal and extent of intensification were analyzed.Results Nineteen cases of perirenal lymphoma were confirmed.Of 19 cases,12 were detected by CT,4 by MRI and 3 by CT and MRI.Image showed perirenal lump or lamellar soft tissue goiter,and the milieu was undefined and invaded into kidney substance,perirenal fascia and adrenal gland,which could circumvallate hilus renalis or retroperitoneal blood vessels but not invade it.The density was same in CT plain scan and was slight to moderate durative intensification which was uniformity in CT enhancement scanning.Enhancement of CT value was less than 20 HU or 40 HU in arterial phase.Miscellaneous or equal signal showed in T1WI and T2WI.Relucent high signal showed in DWI.Slight to moderate durative intensification which was uniformity or uneven showed in MRI.Conclusion Typical image picture of CT and MRI is observed in perirenal lymphoma,which has significant value for diagnosis and antidiastole.