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To assess approaches to the diagnosis and therapy of patients with nontoxic multinodular goiter, a questionnaire was circulated to all members of the American Thyroid Association (ATA). An index case report was presented (42-yr-old woman with an irregular, nontender, bilaterally enlarged thyroid of 50–80 g and no clinical suspicion of malignancy or thyroid dysfunction), and 11 variations were proposed to evaluate how each alteration would affect management. One hundred and forty responses were retained (∼50% of clinically active ATA members). For the index case, a TSH determination was the routine choice of 100%, and serum thyroid autoantibodies were measured by 74%. Simultaneous use of serum TSH, a thyroid hormone assay, and antithyroid peroxidase was employed by 49%. Only 4% included a calcitonin assay. The median number of blood tests ordered was 3 (range, 1–7). Ultrasound was used …