Immunoblastic lymphoma, infectious mononucleosis, and rheumatoid arthritis.
D001172:Arthritis, Rheumatoid / Q000276:immunology*; D002205:Caplan Syndrome / Q000276:immunology; D006801:Humans; D007244:Infectious Mononucleosis / Q000276:immunology*; D008228:Lymphoma, Non-Hodgkin / Q000276:immunology*