Most Common Indications for an ultrasound thyroid are palpable neck mass, cold nodule on a nuclear medicine study, Abnormal thyroid function tests (TFT), palpable multinodular goitre, suspicion of a nodule in a patient with difficult neck palpation, Prior history of neck radiation, Family history of medullary thyroid carcinoma, multiple endocrine neoplasia types 2, or papillary thyroid carcinoma, Unexplained cervical adenopathy, Preoperative thyroidectomy for cancer; long-term postoperative surveillance etc.