原发性肝癌（PLC）是指肝和肝内胆管的原发性恶性肿瘤。PLC是我国常见的恶性肿瘤，发病率高，预后也极严重，因而肝癌的防治工作重点在于预防。肝癌的全面防治包括一级、二级与三级预防。一级预防以“管水、管粮、防肝炎为中心；二级预防队“早查、早诊、早治”为中心；三级预? Primary liver cancer (PLC) refers to the primary malignancy of the liver and intrahepatic bile ducts. PLC is a common malignancy in China, with a high incidence and a very serious prognosis. Therefore, the prevention and treatment of liver cancer focuses on prevention. Comprehensive prevention and treatment of liver cancer includes primary, secondary and tertiary prevention. The primary prevention is centered on water management, grain management, and hepatitis prevention; the second-level prevention team is centered on early detection, early diagnosis, and early management;