[New thoughts are needed for the study of liver cancer recurrence and metastasis].

In the recent years, our knowledge on cancer and metastasis has been renewed, and therefore new thoughts are needed for the study of cancer metastasis. Based on the fact that cancer is a systemic and dynamic disease which is caused by multiple factors, involves various genes, and has multiple stages, more studies should be conducted in the following aspects: (1) intervention of cancer metastasis; (2) systemic intervention focusing on the nervous system, immune status, endocrine, and metabolism; (3) studies on improving residual cancer and microenvironment; (4) studies on multimodality therapy, especially the combination of eradication and modification; (5) dynamic studies on cancer metastasis, especially the intervention leading to increased metastatic potential after tumor eradication.