12例肝脏肉芽肿的MRI表现

MRI Findings of Hepatic Granuloma in 12 Cases

  • 摘要: 目的: 探讨肝脏肉芽肿的MRI表现,提高对本病诊断的准确性。 方法: 对天津医科大学附属肿瘤医院2004年4月~2007年10月经手术病理证实的12例肝脏肉芽肿进行回顾性分析,其中肝脏结核7例,肝脏肺吸虫病2例,特发性肉芽肿3例。全部病例均行上腹MRI检查,序列包括T1WI、T2WI、动态增强MRI(DCE-MRI)和弥散加权(DWI)。 结果: 12例肝脏肉芽肿共13个病灶,其中4个为肉芽肿中早期病灶,9个为纤维化期病灶。1)肉芽肿中早期病灶T1WI呈低信号,T2WI呈较高信号,边界模糊,DCE-MRI于动脉期呈不均匀环形强化,门静脉期及延迟期强化程度逐渐增加,DWI呈稍高信号,ADC值为(1.347±0.379)×10-3(mm2/s),ADC比率为1.103±0.165.2)纤维化期病灶T1WI呈低信号,T2WI呈等信号,边界清楚,DCE-MRI无明显强化或仅边缘线样强化,DWI呈稍高信号,ADC值为(1.382±0.398)×10-3(mm2/s),ADC比率为0.978±0.116。 结论: 肝脏肉芽肿的MRI信号表现能反映其所处的病理时期,并可以与肝脏其它肿物鉴别,因而MRI在肝脏肉芽肿诊断中具有较高价值。

     

    Abstract: Objective: To investigate the MRI features of hepatic granuloma. Methods: Data from 12 cases of granuloma (7 cases of tuberculosis, 2 cases of paragonimiasis, and 3 cases of idiopathic granuloma) proved by surgery and pathology were retro-spectively analyzed.All of the patients underwent T1WI, T2WI, dynamic contrast-enhanced MRI (DCE-MRI), and diffu-sion weighted imaging (DWI). Results: A total of 13 lesions were found in these cases, including 4 lesions at the early and middle stages of granuloma and 9 lesions at the fibrosis stage.The lesions at the early and middle stages were hypointense on T1WI, hyperintense on T2WI, with an ill-defined margin.These lesions showed inhomogeneous circular enhancement in the arterial phase of DCE-MRI and then gradually went to increase in the portal and delayed phase.These lesions were slightly hyperintense on DWI, with an average ADC value of (1.347± 0.379)× 10 -3 mm 2/s and an ADC ratio of 1.103± 0.165.The lesions at the fibrosis stage were hypointense on T1WI, isointense on T2WI, with a well-defined margin.These lesions showed only slight enhancement or no enhancement in DCE-MRI.These lesions showed hyperintense on DWI, with an average ADC value of (1.382± 0.398)× 10 -3 mm 2/s and an ADC ratio of 0.978± 0.116. Conclusion: The MRI findings may re-flect different stages of hepatic granuloma and are helpful to differentiate it from other liver focal lesions.

     

/

返回文章
返回