【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。更多还原

【Abstract】 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: 36）. The course ofdiseases varied from 2 months to 16 years.All patients underwent CT scan,and 13 cases underwent contrast-enhanced CT scansimultaneously.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. Periorbital preseptal 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 intraorbital tissues along with extra ocular muscles were found in other patients,and appeared as either “casting sign” or “ring sign”. Theintrabulbar and bony structures were no abnormality. Isodensity 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 intensityon T₁WI MRI and slightly low or slightly high signal intensity on T₂WI. The lesions demonstrated homogenously marked enhancement oncontrast-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.更多还原