在美国 ,转移瘤已成为肝脏最常见的恶性肿瘤 ,半数以上的晚期肿瘤病人最终都将发生肝转移 ,其发生的比例高于包括肺等的其它器官。尽管原发的经门静脉回流部位的肿瘤多转移至肝 ,但发现乳腺和肺等部位的肿瘤也可发生肝转移。在可发生肝转移的众多实体瘤中 ,结直肠癌及神经内分 In the United States, metastases have become the most common malignancy in the liver, and more than half of advanced cancer patients eventually develop liver metastases, which occur more frequently than other organs, including the lungs. Although the primary tumor at the site of portal venous return is more likely to metastasize to the liver, tumors such as the mammary gland and lungs are found to metastasize to the liver. In many solid tumors that can develop liver metastases, colorectal cancer and neuroendocrine