Successful treatment of methotrexate-associated classical Hodgkin lymphoma with brentuximab vedotin-combined chemotherapy: a case series.

Methotrexate (MTX)-associated classical Hodgkin lymphoma (CHL) is unlikely to regress following discontinuation of MTX, and its treatment usually requires chemotherapy. Standard chemotherapy for CHL is the ABVD regimen, which contains pneumotoxic bleomycin. This can be problematic in MTX-CHL patients suffering from an autoimmune disease (AID), such as rheumatoid arthritis (RA), as they frequently have pulmonary complications. However, brentuximab vedotin (BV)-containing chemotherapy without bleomycin (A + AVD regimen) was recently reported to show favorable efficacy for CHL, and could therefore be beneficial in MTX-CHL. We treated three cases of MTX-CHL using the A + AVD regimen. All were female and had received MTX for more than 15 years. Underlying AIDs in these patients were RA in two patients, and overlap syndrome with systemic lupus erythematosus and dermatomyositis in one patient. The A + AVD regimen resulted in a complete response in all patients. Peripheral neuropathy developed in two patients, necessitating reduction of the BV dose. All three patients experienced hematological toxicity necessitating dose reduction; however, no severe adverse effects, including infection or pulmonary complication, were documented. RA was well-controlled without additional immunosuppressants. The A + AVD regimen is a promising chemotherapy for MTX-CHL with favorable efficacy and tolerable toxicity profiles.