Iliolumbar vein
Vena iliolumbalis · Kyčelně-bederní žíla
Veins
Looks like
A vein running from the lower lumbar spine and iliac bone to the common iliac vein.
What it does
Drains the iliacus and psoas muscles and the lower back.
Keeping it well
Must be tied before moving the big veins in front-approach lower spine surgery, as tearing it bleeds heavily.