What is obturator foramen?

The obturator foramen is a large, oval opening in the pelvic bone located below the acetabulum (hip socket) and is formed by the ischium and pubis bones. It serves as a passage for blood vessels, nerves, and the obturator artery and vein to pass through from the pelvis to the thigh.

The obturator foramen is covered by a thin membrane known as the obturator membrane, which helps to stabilize the pelvis by connecting the ischium and pubis bones.

In some cases, the obturator foramen may be partially or completely closed off by additional bone, a condition known as an obturator hernia. This can cause complications by compressing blood vessels and nerves passing through the foramen, leading to pain and potential damage to surrounding tissues.

Overall, the obturator foramen plays a crucial role in the structural integrity and function of the pelvis, supporting the weight of the body and providing a pathway for important structures to pass through.