An Epstein-Barr virus-associated pulmonary lymphoproliferative disorder as complication of immunosuppression.

Inherited or acquired immunodeficiencies as well as autoimmune diseases treated with cytotoxic drugs are associated with an increased incidence of lymphoma. Non-Hodgkin's lymphomas that occur in the context of drug-induced immunosuppression, acquired or congenital immunodeficiency, are frequently associated with Epstein-Barr virus infection. This report describes the occurrence of an Epstein-Barr virus associated pulmonary B cell lymphoma in a patient with longstanding rheumatoid arthritis treated with methotrexate.