Menu Healthy Lifestyle Diseases & Conditions First Aid Symptoms Tests & Procedures Videos Definitions FAQs Thyroid cancerUpdated: 2020-01-21OverviewThyroid cancer occurs in the cells of the butterfly-shaped gland located at the base of the neck (thyroid).SymptomsSymptoms include a lump on the neck, hoarseness, and difficulty swallowing.TreatmentsTreatment, which is usually successful, includes surgery, hormone therapy, radioactive iodine, radiation, and chemotherapy. © 1998-2022 Mayo Foundation for Medical Education and Research(MFMER). All rights reserved. Terms of Use