Abnormal enlargement of the spleen, often indicating infection, blood disorders, or liver disease. The spleen normally cannot be felt during examination, so any palpable spleen suggests enlargement.
From Greek 'splen' (spleen) + 'megas' (large), meaning 'enlarged spleen.' The term emerged in medical literature during the 19th century as understanding of splenic function and pathology developed.
The spleen is like the body's recycling center for old blood cells, but when it enlarges, it can become hyperactive and start destroying healthy cells too - a condition called hypersplenism! Massive splenomegaly can make the spleen weigh up to 4 kilograms (normal is 150 grams), sometimes requiring surgical removal to prevent life-threatening complications.
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