Where is Morrison's pouch located?

• A. The hepatorenal recess (Morrison's pouch) between the liver and the right kidney
• B. The rectouterine pouch
• C. The subphrenic space
• D. The hepato-gastric space

Answer: (A)

Morrison's pouch is the hepatorenal recess, a peritoneal space on the right side between the liver and the right kidney. When someone is lying on their back, this area is the most dependent part of the peritoneal cavity, so free fluid tends to collect there. That makes it a primary spot checked during FAST ultrasound after trauma to assess for intraperitoneal bleeding. The space is formed by the peritoneal covering between the inferior surface of the liver and the anterior surface of the right kidney, within the hepatorenal region. The other spaces mentioned reside in different locations: the rectouterine pouch is between the uterus and rectum, the subphrenic space lies beneath the diaphragm, and there isn’t a standard space called the hepato-gastric space in this context.