Medline Plus: Spleen Diseases Medline Plus medlineplus.gov https://medlineplus.gov/spleendiseases.html Spleen Diseases - MedlinePlus Health Information Medline Medical Encyclopedia: Spleen Diseases Medline Medical Encyclopedia: Spleen Diseases https://medlineplus.gov/spleendiseases.html#summary fist-size organ medlineplus.gov/spleendiseases.html U.S. National Library of Medicine medlineplus.gov/spleendiseases.html enlarged spleen