TOPICS: Thyroid neoplasia, solitary nodule, 131I radioactive uptake studies, ‘hot’ nodules, Graves disease, cold’ nodules, adenoma and carcinoma, fine needle aspiration (FNA), fibrous capsule, follicular carcinoma, invasive growth, complete removal of the thyroid mass, metastasis, hematogenously, papillary carcinoma, Most common type, ionizing radiation, ‘Orphan Annie eye’ nuclei, nuclear grooves, psammoma bodies, cervical lymph nodes, medullary carcinoma, parafollicular C cells, calcitonin, hypocalcemia, amyloid, sheets of polygonal cells in an amyloid stroma, Congo red,MEN 2A and 2B syndromes, RET gene, prophylactic thyroidectomy, anaplastic carcinoma, aggressive form, undifferentiated malignant cells, esophagus, dysphagia, trachea,respiratory compromise, thyroidectomy, parathyroid glands, hypocalcemia, recurrent laryngeal nerve, inferior thyroid artery, dysphagia and hoarseness