Overview

Thyroid cancer is a cancerous growth that forms in the thyroid gland, a small, butterfly-shaped gland at the base of the neck. The thyroid makes hormones that control the body's temperature, heart rate, and metabolism. Thyroid cancer is one of the most common types of endocrine cancer, and it happens more often in women than in men. Most thyroid cancers grow slowly and can be treated easily, especially if they are found early. Papillary, follicular, medullary, and anaplastic thyroid cancer are the four main types. It is important to check for neck swelling or thyroid nodules early so that diagnosis and treatment can be initiated promptly.

Symptoms
There may be no symptoms of thyroid cancer in its early stages. As it gets worse, people may feel a lump or swelling in their neck that doesn't hurt. Other signs are trouble swallowing, a hoarse voice, a cough that won't go away and isn't caused by an infection, or swollen lymph nodes. Some people may feel pain in their neck or throat.

Causes
The exact causes of thyroid cancer are unknown. Risk factors encompass radiation exposure, particularly in childhood, a family history of thyroid cancer, and specific inherited genetic syndromes. Being female and ageing are both associated with a higher risk. Some groups of people may also be at higher risk due to iodine imbalance.

Diagnosis
A physical exam and thyroid ultrasound are the first steps in diagnosing thyroid disease. Fine-needle aspiration biopsy is a common way to evaluate suspicious nodules. Blood tests measure thyroid hormone levels. Imaging studies help determine the severity of the disease and its stage.

Treatment
Surgery to remove part or all of the thyroid gland is usually part of the treatment. After surgery, radioactive iodine therapy may be used to kill any remaining cancer cells. To keep the body working normally, hormone replacement therapy is necessary. In more serious cases, radiation or targeted therapy may be suggested.

The prognosis for thyroid cancer is predominantly favourable, especially for papillary and follicular variants. People who have early-stage disease have a good chance of living. Regular checkups and hormone management help keep you healthy in the long run and help detect if the disease comes back.