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Antithyroid drugs constitute one of the main pillars in the treatment of hyperthyroidism. They are associated with a variety of adverse effects, most of which are mild or minor. However, there are other rare but potentially fatal adverse effects, such as pancytopenia, of which only a few cases have been reported worldwide. This paper presents a clinical case of febrile neutropenia, associated with anemia and thrombocytopenia, secondary to treatment with methimazole
Echart et al. (Wed,) studied this question.