Paravesical fossa

Anatomical space in the pelvis

The paravesical fossa is an anatomical space located in the pelvis. It is a part of the peritoneal cavity and is situated on either side of the urinary bladder. This fossa is clinically significant as it is a site where certain pathological conditions can manifest, such as the accumulation of fluid or the development of hernias.

Anatomy

The paravesical fossa is formed by the peritoneum, which is a serous membrane lining the abdominal cavity. It is bounded medially by the urinary bladder and laterally by the pelvic wall. The fossa is more prominent when the bladder is empty and tends to flatten out as the bladder fills.

Diagram of the male pelvis showing the paravesical fossa

In males, the paravesical fossa is located anterior to the rectum and posterior to the pubic symphysis. In females, it is situated anterior to the uterus and posterior to the pubic symphysis. The fossa is continuous with the pararectal fossa posteriorly.

Function

The paravesical fossa does not have a direct functional role but serves as a potential space that can accommodate changes in the volume of the bladder. It allows for the expansion of the bladder as it fills with urine. Additionally, it provides a pathway for the spread of infections or fluids within the pelvic cavity.

Clinical Significance

The paravesical fossa is of clinical importance in several conditions:

• Hernias: The fossa can be a site for the development of internal hernias, particularly in cases where there is increased intra-abdominal pressure.
• Fluid Accumulation: In conditions such as ascites, fluid can accumulate in the paravesical fossa, which may be detected during imaging studies.
• Surgical Considerations: During pelvic surgeries, the paravesical fossa is an important landmark for surgeons to avoid injury to the bladder and surrounding structures.

Related Pages

• Peritoneum
• Urinary bladder
• Pelvic cavity
• Pararectal fossa