Portal Vein Formation SMV + Splenic — FRCA Primary MCQ
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Correct answer: A — Superior mesenteric vein and splenic vein (behind the neck of the pancreas)
The portal vein is formed behind the neck of the pancreas by the confluence of the superior mesenteric vein and splenic vein. The inferior mesenteric vein usually drains into the splenic vein (or the SMV or their junction). The portal vein then ascends in the free edge of the lesser omentum (hepatoduodenal ligament) to enter the liver hilum.
Reference: RCoA 2021 Primary FRCA Curriculum