242Original Article Antithyroid Drug-induced Agranulocytosis: Report of 13 Cases

Background: Antithyroid drug (ATD)-induced agranulocytosis is rare but may cause fatal complications in patients with thyrotoxicosis during treatment with thion-amide-derived drugs. From our previous experience, we note that 2 of 11 such patients died in a 10-year retrospective study. Methods: We reviewed thirteen patients who developed agranulocytosis from 7,466 patients with hyperthyroidism while they were being treated with ATD fro