Walsh G, Williams M P
Department of Imaging, Derriford Hospital, Plymouth.
Clin Radiol. 1995 Mar;50(3):174-6. doi: 10.1016/s0009-9260(05)83051-x.
The portal vein is formed by the union of the splenic and superior mesenteric veins behind the neck of the pancreas. This system is derived from the vitelline veins, a component of the extraembryonic venous system. In this paper we report three cases, each of which illustrates a congenital variant of the portal venous system, describe their computed tomography appearances and discuss the embryological processes accounting for these anomalies.
门静脉由脾静脉和肠系膜上静脉在胰颈后方汇合而成。该系统源自卵黄静脉，后者是胚外静脉系统的一个组成部分。在本文中，我们报告了三例病例，每例均展示了门静脉系统的一种先天性变异，描述了它们的计算机断层扫描表现，并讨论了导致这些异常的胚胎学过程。
