Extraperitoneal space

The extraperitoneal space is the portion of the abdomen and pelvis which does not lie within the peritoneum.

It includes:
 * Retroperitoneal space, situated posteriorly to the peritoneum
 * Preperitoneal space, situated anteriorly to the peritoneum
 * Retropubic space, deep to the pubic bone
 * Retro-inguinal space, deep to the inguinal ligament

The space in the pelvis is divided into the following components:
 * prevesical space
 * perivesical space
 * perirectal space