Rheumatoid arthritis and the lymphoma link. It's the disease's chronic, severe inflammation, not the treatment, that causes the risk.
D018501:Antirheumatic Agents / Q000627:therapeutic use; D001172:Arthritis, Rheumatoid / Q000150:complications* / Q000188:drug therapy; D006801:Humans; D008223:Lymphoma / Q000209:etiology*; D018570:Risk Assessment
D018501:Antirheumatic Agents