CT of Fluid-filled Morison ’s pouch

Ascites occupies the hepatorenal fossa (asterisks).
The Right Subphrenic Space The right subphrenic space is a large continuous compartment extending over the diaphragmatic surface of the right lobe of the liver to its margination posteriorly and inferiorly by the right coronary ligament. No true anatomic separation into anterior and posterior subphrenic spaces actually occurs, but such compartmentalization of abscesses frequently takes place by the formation of pyogenic membranes.

Where is the Morison's Pouch?

I have been getting thorough testing to try to determine the source of some mysterious problems that have been recurring over the last year. My doctor just now diagnosed me as having fluid in my Morrison's pouch. What is Morrison's Pouch, and why doesn't everybody have one?
Morison's pouch is a anatomic location in the abdomen. I think it is important for you to have an open and frank discussion with your doctor. Everyone has a Morison's pouch. However, this is a potential space. This means that it is empty in most people. When it fills and actually takes up space--there is often a problem. Fluid is the most common filler--and why it occurs can vary. The actual location of this space is between the liver and the right kidney. It is inside the peritoneum (the inner lining of the abdomen). This space can fill with fluid from a number of causes. One is abdominal trauma or bleeding. Blood can pool there if there is internal damage. However, this is likely not the case for you if you are having problems for years. The other causes of fluid in the abdomen (also known as ascites) can be divided into three main categories. This can be caused by (A) heart problems like congestive heart failure (B) kidney problems like nephrotic syndrome or (C) liver problems like cirrhosis. Ovarian cancer is also a cause in women that should be ruled out. The actual fluid there is not a problem--but what is causing the fluid is a problem. I encourage you to talk with your doctor.
The falciform ligament separates the right and left subphrenic spaces. Mitchell11 has stressed that the region
below and on either side of the free margin of the falciform ligament resembles a delta in which the two subphrenic and the right subhepatic spaces communicate.

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Chest X Ray Imaging