Myocardial infarction after rituximab or other monoclonal antibody therapies has been reported in rare cases, all in patients with classical cardiovascular risk factors or associated inflammatory or lymphoproliferative disorders. We report the case of a 52-year-old man, without classical cardiovascular risk factors or associated inflammatory or lymphoproliferative disorder, treated for seronegative myasthenia with rituximab infusions complicated by myocardial infarction. The exact origin of myocardial infarction after monoclonal antibody treatment is unclear. Myocardial infarction is a rare but possibly fatal complication of rituximab infusion, even occurring in relatively young patients, without classical risk factors and without associated inflammatory or lymphoproliferative disorder.
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