肝脏炎性假瘤的CT及MRI征象

MRI and CT Findings of Inflammatory Pseudotumor of the Liver

目的:探讨肝脏炎性假瘤的CT和MRI表现.方法:8例经手术病理证实的肝脏炎性假瘤.男5例,女3例,年龄35～65岁,平均53岁.8例均作CT平扫及增强扫描,其中3例行MR对比检查.结果:CT表现为1个病灶6例,2个病灶2例,共发现病灶10个.平扫9个病灶表现为低密度,1个病灶表现为稍高密度.动态增强扫描2个病灶动脉期显著强化,门脉期及延迟期中度强化;8个病灶动脉期无明显强化,门脉期及延迟期有不同方式的强化,主要表现为周边完整或不完整的环形或结节状强化,中心核心样强化及线状或不规则分隔样强化.MRI表现为2例病灶T1WI呈低信号,T2WI呈稍高信号,1例病灶T1WI及T2WI均为等信号,动态增强扫描与CT相仿.结论:肝脏炎性假瘤的CT及MRI表现因其病理阶段不同而表现各异,诊断需结合临床,确诊尚依靠病理检查.

Obstractive:To investigate CT and MR appearance of inflammatory pseudotumor of the liver.Methods:Eight patients (five male;three female) aged 35 to 65 years with pathologically proven inflammatory pseudotumor of the liver were included.All of the patients underwent CT scanning,MR images were obtained for comparison in three of the eight patients.Results:On CT scans,6 patients had a single hepatic mass,2 patients had 2 masses and 10 lesions were found in total.On dynamic enhanced CT,2 lesions showed strong enhancement during arterial phase,and moderate enhancement during portal venous phase and delayed phase.No obvious enhancement was seen during arterial phase in 8 lesions,while several patterns of enhancement were demonstrated during portal venous phase and delayed phase,including peripheral enhancement,nodular enhancement,central enhancement and septal enhancement.MRI showed that 2 lesions were hypointense on T 1WI and slightly hyperintense on T 2WI,while 1 lesion was isointense on T 1WI and T 2WI.Dynamic enhanced images were similar to that of CT.Conclusion:The CT and MR appearance of inflammatory pseudotumor of the liver were nonspecific and correct diagnosis depends on pathologic examination.