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Thyroid cancer arises from abnormal cells in the butterfly?shaped thyroid gland at the base of the neck. It is classified mainly into papillary, follicular, medullary, and anaplastic types, with papillary being the most common and generally slow?growing. Most cases are discovered as a painless neck lump or nodule, sometimes with hoarseness, difficulty swallowing, or enlarged lymph nodes.

Diagnosis involves neck ultrasound, blood tests to assess thyroid function, and fine?needle aspiration biopsy to confirm malignancy. Treatment almost always starts with surgery—lobectomy or total thyroidectomy—followed by radioactive iodine therapy for differentiated cancers (papillary and follicular) to destroy remaining thyroid tissue and metastatic cells. After surgery, patients take lifelong thyroid hormone replacement and may need external?beam radiation or targeted drugs for advanced or aggressive forms such as anaplastic or metastatic medullary cancer.

When detected early, thyroid cancer has excellent survival rates, with most localized cases showing near?100% five?year survival. Regular follow?up with neck exams, ultrasounds, and appropriate blood markers helps monitor for recurrence and maintain long?term health.