The causes of CTPV mainly included liver cirrhosis with portal vein thrombus and the portal vein high pressure after splenectomy, moreover liver cancer with portal vein cancer-thrombus, the pylephlebitis and the reason is unclear. 引起门静脉海绵样变性的原因主要包括肝硬化伴门静脉血栓和门静脉高压脾切除术后,另外还有肝癌伴门静脉癌栓、门静脉炎和原因不明。