. .\(VMedCommun\).
The median common vein (lat. vena media communis) is a communicating vessel for the drainage of the common iliac vein, which emerges from the medial part of the common vaginal membrane of the pelvic wall and goes up and to the left, where it is connected to the external iliac vessel below, and the iliopsoas vessel up. It lies medial to the rectum and posterior part of the pubis. The common iliac vein enters this space from top to bottom.