肝血管平滑肌脂肪瘤的CT及MRI表现

CT and MRI findings of hepatic angiomyolipoma

目的:探讨肝血管平滑肌脂肪瘤(HAML)的CT和MR表现。方法:回顾性分析7例(男2例,女5例)病理确诊的HAML患者的CT及MRI影像学表现。结果:CT平扫7例,为低密度到中等密度病灶,4例测得CT值-35.5～-99HU,除1例增强扫描强化不明显外,其余动脉期明显强化。MRI检查4例,T1WI上肿瘤为高信号,脂肪抑制或反相位图像上病灶信号衰减,T2WI上病灶为相对高信号。结论:在影像上肝血管平滑肌脂肪瘤具有一些特征:①含有成熟脂肪组织为脂瘤型HAML相对特征的影像学表现;②病灶内含有强化的血管影是诊断HAML的重要征象。

Objective：To investigate the CT and MRI findings of hepatic angiomyollpoma （HAML）. Methods：The imaging materials of 7 surgically treated patients with HAML were retrospectively analyzed （5 females and 2 males）. Results： With unenhanced CT, 7 cases showed low to moderate density lesions, and the distinct enhancement in 6 tumors was noted with enhanced CT scan. 4 cases undergoing MRI all showed high signal in T1WI and inhomogeneous high signals in T2WI. Conclusion： Hepatic angiomyolipoma demonstrates two characteristic signs：① Mature Fatty content within the tumor is characteristic findings of lipoma-type HAML;②Enhanced vascular vessels within the tumor is another characteristic finding of HAML.