Extraperitoneal space

The extraperitoneal space is an anatomical area located outside the peritoneal cavity. It is divided into several compartments, including the retroperitoneal space, the preperitoneal space, and the subperitoneal space. This space contains various organs, blood vessels, and connective tissues.

Anatomy

The extraperitoneal space is bounded by the parietal peritoneum on one side and the transversalis fascia on the other. It is further divided into:

• Retroperitoneal space: This space lies posterior to the peritoneal cavity and contains organs such as the kidneys, adrenal glands, pancreas, and parts of the aorta and inferior vena cava.
• Preperitoneal space: Located anterior to the peritoneal cavity, this space is less commonly referenced but includes structures such as the urinary bladder and parts of the abdominal wall.
• Subperitoneal space: This space is found below the peritoneal cavity and includes the pelvic organs such as the rectum, uterus, and parts of the urinary system.

Clinical Significance

The extraperitoneal space is significant in various medical procedures and conditions. For instance, extraperitoneal bladder rupture is a type of injury that occurs when the bladder is damaged outside the peritoneal cavity. Additionally, the retroperitoneal space is a common site for certain types of cancer, such as retroperitoneal sarcoma.

Related Pages

• Peritoneal cavity
• Retroperitoneal space
• Parietal peritoneum
• Transversalis fascia
• Kidneys
• Adrenal glands
• Pancreas
• Aorta
• Inferior vena cava
• Urinary bladder
• Pelvic organs
• Rectum
• Uterus
• Urinary system
• Retroperitoneal sarcoma

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