Morison’s pouch is also known as the posterior right subhepatic space or hepatorenal fossa. It separates the liver from the right kidney and is not filled with any fluid under normal conditions. It is a potential space, meaning a space that can occur between two adjacent structures that are normally pressed together. The anterior boundary consists of the right hepatic lobe and gallbladder.
Posteriorly, there is the right kidney, right adrenal gland, the second part of the duodenum, hepatic flexure, and pancreatic head. The transverse mesocolon lies inferiorly. The posterior right subhepatic space communicates with the right subphrenic space and right paracolic gutter.