Pneumatosis intestinalis (PI) is a rare disorder characterized by the gas within the intestinal mucosa. This is the first report methotrexate (MTX) induced PI under hemodialysis (HD) patient. A 46-year-old man suffered rheumatoid arthritis and underwent HD at local HD center. After the initial induction of MTX, the patient showed epigastralgia and diarrhea. He was referred to our hospital and abdominal computed tomography showed significant large intestinal edema and free intraperitoneal air consistent with PI. Physicians should aware that MTX is contraindication drug for chronic kidney disease and high-flux HD may decrease MTX toxicity and oxidative stress, improving PI.
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