Development of myeloid sarcoma after long-term methotrexate use for rheumatoid arthritis.

Abstract excerpt

Myeloid sarcoma (MS) in the complete absence of bone marrow disease is an extremely rare phenomenon. We report the case of a 78-year-old woman with multiple subcutaneous lung and liver nodules, including mediastinal and peritoneal lymph node swelling, who had been receiving methotrexate (MTX) for 10 years for rheumatoid arthritis (RA). She was initially diagnosed with ALK-negative anaplastic large cell lymphoma....

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