论文部分内容阅读
目的探讨MRI对肝腺瘤的诊断价值。方法回顾性分析10例肝腺瘤患者的MRI表现。结果病理证实肝腺瘤10例,其中MRI诊断为肝腺瘤5例。7例单发,直径为(5.2±1.9)cm;3例多发,最大病灶直径为(9.0±3.0)cm。8例T1WI序列和T2WI序列呈长T1和长(稍长)T2信号,1例呈长T1稍短T2信号,1例呈短T1等T2信号;9例回波序列见大量脂质成分。增强扫描时,7例动脉期病灶明显强化,门脉期及延迟期造影剂消退,病灶为等信号或稍高信号;2例动脉期轻度不均匀强化;1例动脉期病灶增强与肝实质近似,门脉期和延迟期造影剂较前消退。肝腺瘤呈现“快进慢出”信号特征;8例门脉期及延迟期病灶周围可见环形强化假包膜。结论肝腺瘤的增强MRI有特征性表现,有助于与其他肝内肿瘤鉴别,但明确诊断仍须要病理支持。
Objective To investigate the diagnostic value of MRI for hepatic adenoma. Methods The MRI findings of 10 patients with hepatic adenoma were retrospectively analyzed. Results The pathology confirmed 10 cases of hepatic adenoma, of which 5 cases were diagnosed as hepatic adenoma by MRI. Seven cases were single with a diameter of (5.2 ± 1.9) cm. Three cases were multiple and the diameter of the largest lesion was (9.0 ± 3.0) cm. 8 cases of T1WI and T2WI showed long T1 and long T2, long T1 and long T1 signals, while T1 showed a slightly longer signal of T1 and shorter T2 signal of T1. Shorter T1 and T2 signals were observed in 1 patient. A large number of lipid components were found in 9 echo sequences. In contrast enhancement, 7 cases of arterial phase lesions were significantly enhanced, contrast agent in portal phase and delayed phase subsided, lesions were equal signal or slightly higher signal; 2 cases of mild arterial phase enhancement; 1 case of arterial phase enhancement and liver parenchyma Approximate, portal phase and delayed contrast agents subsided. Hepatic adenoma showed “fast forward and slow out” signal characteristics; 8 cases of portal vein and delayed lesions can be seen around the annular enhancement pseudofacial. Conclusions Enhanced MRI of hepatic adenoma has the characteristic manifestation, which is helpful to distinguish it from other intrahepatic tumors. However, definite diagnosis still requires pathological support.