Posterior right subhepatic space
The posterior right subhepatic space (also known as the hepatorenal fossa or Morison pouch) separates the liver from the right kidney. It is a potential space that is not filled with any fluid in normal conditions.
Gross anatomy
The posterior right subhepatic space is a subcompartment of the supramesocolic space and is separated from the anterior right subhepatic space by the transverse mesocolon.
Boundaries
- anterior: right hepatic lobe and gallbladder
- posterior: superior aspect right kidney; right adrenal gland; second part of the duodenum; hepatic flexure; pancreatic head
- inferior: transverse mesocolon
- superior: closed by the inferior layer of the coronary ligament and the right triangular ligament
Communications
The posterior right subhepatic space communicates with the right subphrenic space and right paracolic gutter. The posterior right subhepatic space communicates with the lesser sac via the epiploic foramen (foramen of Winslow).
History and etymology
Named by James Rutherford Morison (1843-1939), British surgeon .
Related pathology
Fluid (e.g. ascites or hemoperitoneum) accumulates here as it is one of the lowest dependent spaces in the peritoneal cavity. It is also a preferential site for metastases and abscesses.
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