Abstract:

Objective To analyze the location characteristics of embolism in the portal vein system and to probe the pathogenesis of this disease.  Methods  267 cases of embolism in the portal vein system were collected and were given at least one of the following examinations: ultrasound, MRI, or DSA, and all were givenplain and enhanced scanning of multi-spiral CT. 242 of them had malignant tumors proved by operation or biopsy. Involved condition of both the upper mesenteric veins and splenic veins were compared, and involved scale of embolism in the portalvein system was detected.  Results ① Upper mesenteric veins （145/267，79.2%）were more likely to be involved than splenic veins （17/267，6.4%）in embolism ofthe portal vein system（P<0.05）. ② The total number of involved vein sections in the portal vein system of this disease was obviously higher in the noncancerous group than in the malignant tumor group(P＜0.05).  Conclusion  Functional， anatomical and blood dynamic characteristics of the mesenteric vein are greatly related to embolism of the portal vein system. Embolism scale caused by noncancerous diseases is wider than that caused by malignant tumors.

Key words: Portal vein; Embolism; Pathogenesis; Tomography， X-ray computed