The Hidden Backup Spleen

Not only do 1 in every 10 people have a tiny second spleen, called an accessory spleen, but if the main spleen is removed, the tiny second spleen can grow to function as a new spleen. In many people, this extra bit of spleen tissue sits quietly and does not cause any problems. This hidden backup helps the body keep filtering blood and fighting certain infections even after the primary spleen is gone.

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