What is the initial step in the workup of a patient with a thyroid nodule?

What is the initial step in the workup of a patient with a thyroid nodule?

• A. Check TSH
• B. Neck ultrasound
• C. Fine-needle aspiration
• D. CT scan

Answer: (A)

Measuring thyroid-stimulating hormone (TSH) first guides the entire workup by telling you how the thyroid is functioning and what the nodule might mean for management. If TSH is suppressed, the nodule may be hyperfunctioning (toxic), so the next step is typically functional imaging to see if the nodule is “hot” and often no biopsy is needed because hot nodules have a very low risk of cancer. If TSH is normal or high, the likelihood of cancer is not determined by function, so the focus shifts to the nodule’s anatomy—evaluating its size and suspicious features with neck ultrasound to decide if a fine-needle aspiration is warranted. CT is not the initial test because it doesn’t provide functional information and is not routinely used in the first-line assessment. So starting with TSH helps tailor the next steps—whether to pursue functional imaging or to evaluate morphology and consider biopsy.

Measuring thyroid-stimulating hormone (TSH) first guides the entire workup by telling you how the thyroid is functioning and what the nodule might mean for management. If TSH is suppressed, the nodule may be hyperfunctioning (toxic), so the next step is typically functional imaging to see if the nodule is “hot” and often no biopsy is needed because hot nodules have a very low risk of cancer. If TSH is normal or high, the likelihood of cancer is not determined by function, so the focus shifts to the nodule’s anatomy—evaluating its size and suspicious features with neck ultrasound to decide if a fine-needle aspiration is warranted. CT is not the initial test because it doesn’t provide functional information and is not routinely used in the first-line assessment.

So starting with TSH helps tailor the next steps—whether to pursue functional imaging or to evaluate morphology and consider biopsy.