Definition
The iliolumbar vein drains blood from the iliac and lumbar regions. Specifically, it collects blood from the muscles of the lower back and the iliac fossa (a part of the hip bone). This vein is important for returning deoxygenated blood from these areas to the heart. It acts as a connection between the iliac and lumbar venous systems. Think of it as a regional blood-return route, ensuring the lumbar and pelvic regions stay healthy.