CT和MR在眼眶淋巴瘤诊断中的价值  

The Value of CT and MRI in Diagnosis of Orbital Lymphomas

作　　者：张明[1] 王渊[1] 王微微[1] 陈燕[1] 王斐[1] 鱼博浪[1] 

机构地区：[1]西安交通大学第一附属医院影像中心,陕西西安710061

出　　处：《实用放射学杂志》2006年第2期158-161,共4页Journal of Practical Radiology

基　　金：中国博士后科学基金资助(2004035718)。

摘　　要：目的探讨CT和MR检查在诊断眼眶淋巴瘤中的价值。方法14例眼眶淋巴瘤,男9例,女5例,年龄1岁6个月～6岁,平均36岁。病程2个月～16年。14例行CT平扫,13例同时行强化扫描,5例行MR平扫及强化扫描。结果所有病例经病理证实,其中10例为单侧,4例为双侧,均累及隔前眶周组织,12例以眼眶的上象限为主,2例以下象限为主,境界不清。5例呈局限性块影;9例呈弥漫软组织影,沿肌锥外向眶内浸润生长,同时累及泪腺和邻近眼外肌,并沿肌锥外向眶内生长呈“铸形样”改变;例大部分眼环被肿瘤组织环绕,呈“光芒样”改变,并累及球后,眼球内结构未见异常。CT平扫肿瘤组织呈境界欠清的中等密度软组织块影,MRT1W肿块呈中等偏低信号强度,T2W呈较低或略高信号强度。CT及MR增强扫描肿块均呈较明显的均匀强化。结论CT和MR,尤其是MR可较准确地显示眼眶淋巴瘤的部位、形态、内部结构,以及其他特征性影像学表现,能够达到术前定性诊断。Objective To study the value of CT and MR in diagnosing orbital lymphomas. Methods There were totally 14 patients with primary orbital lymphoma including 9 males and 5 females,the age ranged from 1.5 to 65 years old （average age： 361. The course of diseases varied from 2 months to 1 6 years . All patients underwent CT scan , and 1 3 cases underwent contrast - enhanced CT scan simultaneously. Plain and contrast MR scans were performed in 5 patients. Results The diagnosis was confirmed pathologically in all cases. The lesions of 4 cases were bilateral and 10 cases were unilateral. Pcriorbital prcscptal tissues were involved mainly in upper lateral quadrant of the orbit. Focal masses were showed in 5 patients. The lesions that infiltrated the lacrimal gland, adjacent extra ocular muscles, and intra orbital tissues along with extra ocular muscles were found in other patients , and appeared as either ＂ casting sign ＂ or ＂ ring sign ＂ . The intrabulbar and bony structures were no abnormality. Isodcnsity soft - tissue masses with clear demarcation were found on plain CT film,and homogenous enhancement of tumors was observed on contrast - enhanced CT scan. The lesions displayed low to intermediate signal intensity on T1 WI MRI and slightly low or slightly high signal intensity on T2 WI . The lesions demonstrated homogcnously marked enhancement on contrast - enhanced MRI. Conclusion The examination of CT and MRI, especially MRI can demonstrate the location,configuration,inside structure and characteristic manifestations of the orbital lymphomas ,the diagnosis can be made preoperatively.

关 键 词：眼眶肿瘤 淋巴瘤 体层摄影术 X线计算机 磁共振成像 

分 类 号：R739.72[医药卫生—肿瘤] R814.42[医药卫生—临床医学]