A thyroid nodule is found on a 40-year-old woman on routine evaluation. She has no prior history of thyroid disease and clinically feels well. There is a 15-mm nontender nodule on the right lobe of the thyroid with no associated lymphadenopathy. Thyroid function tests are normal. Which of the following is the most appropriate next step in management?
thyroid scan fine needle aspiration (FNA) biopsy repeat assessment in 6 months partial thyroidectomy