NOCARDIA-ASTEROIDES PNEUMONIA COMPLICATING LOW-DOSE METHOTREXATE TREATMENT OF REFRACTORY RHEUMATOID-ARTHRITIS

Low dose methotrexate is used increasingly often in the treatment of rheumatoid arthritis. Severe complications due to toxicity of the lung or bone marrow occur infrequently. This report describes a 71 year old woman with longstanding rheumatoid arthritis who developed pleuritis, a pulmonary infiltrate, and pancytopenia during treatment with low dose methotrexate. Fatal respiratory insufficiency followed, and cultures from the lung after death showed Nocardia asteroides.