目的探讨肝脏第IX段临床应用解剖及其占位性病变的介入治疗。方法对50例肝脏进行解剖观察;对6例肝脏第IX段占位性病变进行介入栓塞化疗。结果肝脏第IX段动脉主要来源于肝右动脉,部分来自肝中动脉或肝左动脉;门静脉主要来自门静脉右前叶上段支,小部分来自门静脉左支横部;胆管汇入右肝管;静脉血由数支细小静脉经第3肝门直接汇入肝后下腔静脉,部分汇入肝右静脉。第IX段肝脏肿瘤通过血管介入治疗后,肿瘤显著缩小;其中4例合并黄疸患者肝功能明显缓解。结论肝脏第IX段是一个结构上较为独立的区域,有其特殊的管道系统和引流系统,位置深隐,单独或联合手术切除较困难;通过介入技术可以对该区段进行相应的治疗。利用微导管采用超选技术,可以对肝脏第IX段的病变进行精确的治疗,微创、副作用小、可重复操作,能够弥补外科手术的局限性,达到甚至超过外科手术的治疗效果。 Objective To investigate the clinical application anatomy of segment Ⅰ of the liver and interventional treatment of its space-occupying lesions. Methods 50 cases of liver anatomy were observed; 6 cases of liver space occupying lesions IX interventional chemoembolization. Results The arterial phase of the hepatic segment IX mainly came from the right hepatic artery, partly from the middle hepatic artery or the left hepatic artery. The portal vein mainly came from the suprarenal branch of the portal vein, the small part from the left branch of the portal vein, the duct into the right hepatic duct, By several small veins by the third portal directly into the after the inferior vena cava, part of the right hepatic vein. Stage IX of liver tumors after vascular intervention significantly reduced the tumor; 4 patients with jaundice in patients with liver function was significantly relieved. Conclusion Stage I of the liver is a structurally independent area with its special duct system and drainage system. It is difficult to remove the tumor by single or combined surgery. The treatment can be performed by interventional technique. The use of microcatheter over-selection technique can be used to accurately treat the lesions in segment IX of the liver with minimal invasiveness, small side effects, and repeatable operations, which can make up for the limitations of surgery and surpass or surpass the surgical results.