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Anatomy Atlases: Illustrated Encyclopedia of Human Anatomic Variation: Opus II: Cardiovascular System: Portal Vein Formation.

Illustrated Encyclopedia of Human Anatomic Variation: Opus II: Cardiovascular System

Portal Vein Formation.

Ronald A. Bergman, PhD
Adel K. Afifi, MD, MS
Ryosuke Miyauchi, MD

Peer Review Status: Internally Peer Reviewed


Image of portal vein formation

Upper Left, Fig. 1. The usual arrangement, the inferior mesenteric enters the splenic vein, while the left gastric enters the portal vein.

Upper Right, Fig. 2. In this case, the left gastric enters the splenic vein, while the inferior mesenteric enters the portal vein.

Lower Left, Fig. 3. The left gastric and the inferior mesenteric both join the portal vein.

Lower Right, Fig.4. The left gastric, splenic and the inferior mesenteric enter the portal vein directly.

from Thompson, 1890

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