D73.2: Chronic congestive splenomegaly
The spleen is on the top left side of the abdomen. Old blood cells are broken down in the spleen. Furthermore, defense cells are stored. If the defense cells are needed, they are then released from the spleen into the blood.
The blood is building up in your spleen. This can happen when the blood no longer drains properly. For example, the blood no longer drains properly if the blood pressure in some of the blood vessels is too high. It can also be caused by a blood clot forming in a large vessel of the spleen. This splenic vessel carries the blood away from your spleen. Your spleen is too large because blood has been accumulating in your spleen for a long time.
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