Immunodeficiency-related lymphoproliferative disorders (IR-LPD) may occur in the setting of immunosuppressive therapy with methotrexate and TNF-α antagonists. As far as we are aware, this is the first report of an Epstein-Barr virus-associated B-cell lymphoproliferative disorder, secondary to methotrexate therapy in a patient with mycosis fungoides/Sézary syndrome.
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