摘要: Benign liver tumors are becoming a subject of great interest because increased access to medical care has allowed discovery many incidental focal lesions. These may be hepatocellular, biliary, or stromal in nature. Several new lesions have been described recent years causing need reassess the pathogenesis and classification hepatic tumors. Hepatocellular nodules neoplastic regenerative response injury. The size structure varies with distribution severity injury, leading complex classification. Variation fat content is easily detected on ultrasonography as fatty change sparing. Biliary cells also produce often cystic Stromal varied nonparenchymal cell types liver.