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摘要


脂肪肝在國人並不罕見,然而肝臟局部的脂肪浸潤則是近年來才被注意到的現象,本文報告2例經病理組織學證實為脂肪肝伴有局部無脂肪浸潤的病例。由於超音波檢查發現肝臟中有一低囘音病灶,而做了各種進一步的檢查。其中1例之電腦斷層掃瞄呈現整個肝臟密度降低,但無腫瘤,肝臟血管攝影及同位素肝掃瞄均無異常發現。經由超音波指引下之肝生檢顯示低囘音區為正常組織或只有輕微脂肪變化,而其他部份則為明顯之脂肪變化。 超音波影像與肝內腫瘤相異的特點為:非病灶區呈現囘音亮度增加,而病灶區並無腫瘤的實質效應-如血管之壓迫、移位或肝臟外形之改變等。病灶之位置常位於肝右葉近膽囊處也可做為鑑別診斷之參考。 臺灣為肝細胞癌之盛行區,局部之脂肪肝變化可能造成診斷上的難題。如果能注意這些超音波影像上的特點,或可避免一些侵襲性檢查所造成的併發症及不必要的醫療費用。

並列摘要


The ultrasonic features of histologically verified hepatic steatosis with focal sparing in two patients were reported. They manifested as a hypoechoic tumor at the right lobe of the liver. However, absence of mass effect in the tumor area, and increased reflectivity of the remaining liver parenchyma were suggestive of hepatic steatosis with focal sparing by the ultrasonography. Ultrasound-guided biopsy from the hypoechoic tumor revealed mild fatty infiltration in contrast to marked fatty infiltration in the remaining non-tumor parenchyma. This rare ultrasonic features should be considered in the differential diagnosis of focal hepatic lesions.

並列關鍵字

hepatic steatosis ultrasonography

延伸閱讀