自1963年美国Starzl施行世界第1例人体原位肝移植以来，历经40年的发展，随着对手术适应证及手术时机选择的新认识，手术方式的改进，安全有效的免疫抑制药物的开发及其它肝移植围手术期治疗的综合进展，肝移植已在全世界步入成熟时期。我国70年代末曾掀起了肝移植的第一个高潮，80年代处于停滞阶段，至90年代又掀起了第二个高潮，但直到近3～4年，才开始取得较好疗效，跻身于国际先进行列。现拟从肝移植指征、手术技术改进及免疫抑制药物的发展三方面来谈谈肝移植近年的重大进展。
Couinaud first proposed the naming of S9 segment of liver in 1994, and Liu Yunyi further promoted this naming in his work “Applied Anatomy of Hepatectomy and Liver Transplantation” in 2016. However, it has not been widely recognized and supported in the field of liver surgery for a long time. In recent years, due to the promotion and gradual maturity of endoscopic technology, there has been a more detailed understanding and demand for anatomy of liver and bile duct. Therefore, this article further explores the clinical value and significance of S9 segment of liver.