Extraperitoneal space

The extraperitoneal space is the portion of the abdomen and pelvis which does not lie within 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:^[1]

References

↑ O'Connell AM, Duddy L, Lee C, Lee MJ (2007). "CT of pelvic extraperitoneal spaces: an anatomical study in cadavers". Clinical radiology. 62 (5): 432–8. PMID 17398268. doi:10.1016/j.crad.2006.11.012.

Anatomy of the peritoneum and mesentery

General

Abdominal

From ventral mesentery	Lesser omentum Hepatoduodenal ligament Hepatogastric ligament Liver Coronary ligament (Left triangular ligament Right triangular ligament Hepatorenal ligament) Falciform ligament (Round ligament of liver and Ligamentum venosum in it, but not of it)
From dorsal mesentery	Greater omentum Gastrophrenic ligament Gastrocolic ligament Gastrosplenic ligament Mesentery Splenorenal ligament Phrenicocolic ligament Folds Umbilical folds Supravesical fossa Medial inguinal fossa Lateral umbilical fold Lateral inguinal fossa Ileocecal fold
Abdominal cavity	Greater sac Lesser sac Omental foramen
General	Cystohepatic triangle Hepatorenal recess of subhepatic space Abdominal wall Inguinal triangle Peritoneal recesses Paracolic gutters Paramesenteric gutters

Uterus/ovaries	Broad ligament of the uterus Mesovarium Mesosalpinx Mesometrium) Ovarian ligament Suspensory ligament of ovary
Recesses	Male Recto-vesical pouch Pararectal fossa Female Recto-uterine pouch Recto-uterine fold (Uterosacral ligament) Vesico-uterine pouch Ovarian fossa Paravesical fossa Retroperitonium

Spaces

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