ArticleOxford medical case reports2025
Therapy related myelodysplastic syndrome: a hematologic sequela of low dose methotrexate in rheumatoid arthritis.
Article in Oxford medical case reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Introduction: Methotrexate (MTX) is a key drug in rheumatoid arthritis (RA) management but can rarely cause life-threatening hematologic toxicity, including therapy-related myelodysplastic syndrome (t-MDS), even at low doses. Case Presentation: A 58-year-old male with RA on low-dose MTX (7.5 mg/week) presented with pancytopenia. Evaluation showed Hb 5.7 g/dL, TLC 1300/μL, and platelets 63 000/μL. Nutritional deficiencies, infections, and autoimmune flare were excluded. Bone marrow examination revealed dysplasia with 11% blasts and abnormal precursors, suggestive of t-MDS. MTX and leflunomide were discontinued. He received leucovorin, G-CSF (Granulocyte colony stimulating factor), and supportive care. Rapid hematologic recovery was observed. Conclusion: This case highlights the potential for low-dose MTX to cause t-MDS, which may be reversible if detected early. As serum MTX levels do not correlate with toxicity, regular blood count monitoring is essential. Prompt drug withdrawal and supportive therapy can lead to full recovery and prevent permanent marrow damage.
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