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肝硬化基础上合并的低分化小肝细胞癌( HCC)磁共振成像( MRI)增强扫描表现为不强化或轻中度强化,在弥散加权成像( DWI)上多呈高信号,容易诊断。但当分化较好的小HCC DWI表现为等信号或稍高信号且常规MRI增强扫描表现为不强化或仅有轻度强化时,与肝硬化结节或结节样增生的影像表现有重叠,诊断有一定的困难。该文通过常规 MRI扫描、DWI扫描、增强扫描及临床生化特征,综述了肝硬化基础上合并小HCC的影像表现及鉴别诊断,以提高小HCC的诊断水平。“,”The low differentiation of small hepatocellular cacinorma ( HCC) in cirrhosis with non or mild-to-moderate enhancement after contrast management of magnetic resonance imaging ( MRI) shows high signal in diffusion weighted imaging ( DWI) ,which is easy for diagnosis.However for cases with well differentiated small HCC DWI isointensity or slightly high intensity which show non or mild enhancement in enhanced regu-lar MRI scanning,with overlap with the image of cirrhosis nodules or nodular hyperplasia,there is a certain difficulty for the differentiation diagnosis .Here is to make a review of the features and differential diagnosis of small HCC in cirrhosis on conventional MRI,DWI and enhanced MRI and their clinical biochemical charac-teristics,expecting to improve the diagnosis of small HCC in cirrhosis .