MRI诊断含脂质肝脏肿瘤的价值

目的:评估MRI诊断含脂质肝脏肿瘤的价值.材料和方法:回顾性分析34例含脂质肝脏肿瘤的MRI表现和术前或穿刺前诊断,并与病理对照.结果:T1WI 32例呈高信号、2例低信号,T2WI 32例呈高信号、1例等信号、1例低信号.用脂肪抑制后,15例肝细胞癌(HCC)、7例血管平滑肌脂肪瘤(HAML)、1例肝腺瘤和1个局灶结节性增生(FNH)T1WI的高信号完全消失,1例不典型腺瘤样增生结节局灶癌变和1例HAML出血囊变T1WI 高信号大部分消失,6例肝腺瘤和1个FNH病灶T1WI高信号无变化 .26例血供丰富,4例血供不丰富.14例HCC、2例腺瘤、7例HAML和1例FNH诊断正确,2例HAML诊断为良性肿瘤.结论:MRI能显示含脂质肝脏肿瘤的特征性表现,并正确诊断多数这类肿瘤.

MR Imaging Findings of Hepatic Tumors Contained Lipid

Purpose:To evaluate the value of MRI in the diagnosis of hepatic tumors contained lipid. Materials and Methods:MR imaging features and diagnosis of 34 cases with hepatic tumors contained lipid were retrospectively reviewed and compared with pathologic findings. Results:Thirty-two lesions were hyperintense on T1WI and T2WI. Two lesions were hypointense on T1WI, 1 lesion isointense and 1 lesion hypointense on T2WI. After applying fat suppression technique, the hyperintense on T1WI totally decreased in 15 hepatocellular carcinomas (HCCs), 7 hepatic angiomyolipomas (HAMLs), and 1 focal nodular hyperplasia (FNH), partly decreased in 1 dysplastic nodule with focal HCC and 1 HAML with hemorrhage and cystic change, remained unchanged in 6 hepatic adenomas and 1 FNH. Twenty-six lesions were hypervascular and 4 lesions hypovascular. Fourteen HCCs, 2 adenomas, 7 HAMLs and 1 FNH were diagnosed correctly and 2 HAMLs were diagnosed as benign tumors. Conclusion:MR imaging can reveal the characteristic features of hepatic tumors contained lipid, and accurate diagnosis most of those tumors.