3. Enlarged Spleen -- Information from the Merck Manual
When the spleen enlarges, it traps and stores an excessive number of blood cells and platelets (hypersplenism), thereby reducing the number of blood cells and platelets in the bloodstream. A person may also have abdominal or back pain in the area...
http://www.merck.com/mmhe/sec14/ch179/ch179b.html#sec14-ch179-ch179b-553

4. Hypersplenism -- Information from Healthwise
Banti syndrome is a disorder of the spleen, the large, gland-like organ in the upper left side of the abdomen that produces red blood cells before birth and, in newborns, removes and destroys aged red blood cells, and plays a role in fighting...
http://www.everettclinic.com/kbase/nord/nord722.htm

5. Hypersplenism -- Information from Health A to Z
Hypersplenism is a type of disorder which causes the spleen to rapidly and prematurely destroy blood cells. Hypersplenism is sometimes referred to as enlarged spleen (splenomegaly). An enlarged spleen is one of the symptoms of hypersplenism.
http://www.healthatoz.com/healthatoz/Atoz/ency/hypersplenism.jsp