弥漫型脂肪肝的假肿瘤征CT 诊断

目的 研究弥漫型脂肪肝中残留的局灶性正常密度的肝组织（ＦＳＡ）的ＣＴ特征，并讨论它与肝肿瘤的鉴别。方法 回顾性分析１７例弥漫型脂肪肝（包括肿瘤患者８例）中共２４个ＦＳＡ的ＣＴ平扫和增强表现，３例作了肝穿刺活检，其余病例均经过Ｂ超或ＣＴ追踪复查１～３年，ＦＳＡ大小及形态无明显变化。结果 多数ＦＳＡ呈典型ＣＴ表现。ＣＴ正确诊断ＦＳＡ２０例和误诊ＦＳＡ４例，其中３例ＦＳＡ的部位及形态不典型呈结节状，境界

CT Diagnoses of Pseudotumor in Diffuse Fatty Liver

Objective\ To study CT finding of focal spared areas (FSA)in diffuse fatty liver and differentiate from liver tumor. Methods To analyze retrospectively CT finding of 24 FSA before and after contrast-enhansement in seventeen patients which including eight tumor patients,three of them proven by liver biopsy and the rest patients by follow-up with US or CT showed no changes in size and shape of FSA in one to three years. Results CT findings of most FSA in diffuse fatty liver were typical and were diagnosed correctly.Three of four FSA in diffuse fatty liver that were misdiagnosed for tumor on CT imagings,with atypical location and shape,showed enhancement on CT during arterial phasic and delay phasic imagings. Conclusion Typical CT finding of FSA in diffuse fatty liver were diagnosed correctly,and it was necessary for liver biopsy in the rare atypical cases if CT diagnoses of FSA were difficult.