You may need to have tests that show exactly where the abnormal thyroid growth is located. This will help the surgeon find the growth during surgery. You may have a CT scan, ultrasound or other imaging tests.
Your doctor may also do a fine needle aspiration to find out if the growth is noncancerous or cancerous. Before surgery, your vocal cord function may be checked.
Your doctor may check the calcium level in your blood after surgery. This is done more often when the whole thyroid gland is removed.