结外型淋巴瘤CT、MRI分析

Analysis of extranodal lymphoma with CT and MRI

目的旨在探讨结外型淋巴瘤CT、MRI的表现特征,提高诊断准确率。方法回顾性分析45例经组织病理证实的结外型淋巴瘤CT、MRI表现,观察其肿瘤实质的密度和信号特点、生长形态、边缘、增强后强化程度等。结果所有患者组织病理学检查均为非霍奇金氏淋巴瘤。淋巴瘤呈实体状,在CT上为中等密度,MR呈稍长T1、T2信号。肿瘤形态分三类,生长于中空器官者表现为管壁较均匀增厚;发生在实质器官者,其形态类似发病器官;沿器官周围生长者,包绕器官、侵蚀器官周边组织。肿瘤边缘与器官组织分界不清。肿瘤实质为轻-中度均匀强化。可伴有局部淋巴结转移。结论CT、MRI诊断全身结外型淋巴瘤具有一定的难度。应仔细观察、认真分析影像学表现,力争发现有助于正确诊断的特有征象,并与其它有关病变进行鉴别,以作为考虑结外淋巴瘤的依据。

Objective To explore the CT and MRI imaging features of extranodal lymphoma in order to improve its diagnostic accuracy race. Methods The manifestations of CT and MRI in 45 patients histologically confirmed as extranodal lymphoma were retrospectively anadyzed.The densities and signal characteristies,shapes of growth,borderline and enhanced degrees of tumorous parenchymas were observed. Results The lesions of all cases were histopathologically examined and were verified as non-Hodgkin＇s lymphoma.The tumors were solid.They were middling density on CT.hypointensity signal on T1WI and slightly hyperintensity signal on T2WI.The tumorous shapes were divided into three types：it showed thicking of wall in tubal organ,the tumors growth resemble to its organ in parenchymal organ,the tumors tpye that contained or erode peripheral tissue of the organ in side organ.The dividing line between lesion and organ was blurry.When injected contrast midium.tumorous parenchyma was lightly or medium enhanced.metastasis of local lymphatic node could be seen.Conclusion CT and MRI diagnosis of extranodal lymphoma in whole body is some difficult.Carefully observing and analyzing the imaeg features,discovering diagnostic manifestations which is useful to diagnosis and differentiation from relative diseases,it can be used as diagnostic basis of extranodua lymphoma.