About Thyroid Cancer

Thyroid cancer occurs in the cells of the thyroid — a butterfly-shaped gland located at the base of your neck, just below your Adam's apple. Your thyroid produces hormones that regulate your heart rate, blood pressure, body temperature and weight. Thyroid cancer might not cause any symptoms at first. But as it grows, it can cause pain and swelling in your neck.

Several types of thyroid cancer exist. Some grow very slowly and others can be very aggressive. Most cases of thyroid cancer can be cured with treatment. Thyroid cancer rates seem to be increasing. Some doctors think this is because new technology is allowing them to find small thyroid cancers that may not have been found in the past.

Symptoms

• Thyroid cancer typically doesn't cause any signs or symptoms early in the disease. As thyroid cancer grows, it may cause:
• A lump (nodule) that can be felt through the skin on your neck
• Changes to your voice, including increasing hoarseness
• Difficulty swallowing
• Pain in your neck and throat
• Swollen lymph nodes in your neck

Causes

It's not clear what causes thyroid cancer.Thyroid cancer occurs when cells in your thyroid undergo genetic changes (mutations). The mutations allow the cells to grow and multiply rapidly. The cells also lose the ability to die, as normal cells would. The accumulating abnormal thyroid cells form a tumor. The abnormal cells can invade nearby tissue and can spread (metastasize) to other parts of the body.

Types of thyroid cancer

Thyroid cancer is divided into types based on the kinds of cells found in the tumor. Your type is decided when a sample of tissue from your cancer is examined under a microscope. The type of thyroid cancer is considered in determining your treatment and prognosis.
Types of thyroid cancer include:
Papillary thyroid cancer. The most common form of thyroid cancer, papillary thyroid cancer arises from follicular cells, which produce and store thyroid hormones. Papillary thyroid cancer can occur at any age, but most frequently it affects people ages 30 to 50. Doctors sometimes ask papillary thyroid cancer and follicular thyroid cancer together as differentiated thyroid cancer.
Follicular thyroid cancer. Follicular thyroid cancer also arises from the follicular cells of the thyroid. It usually affects people between 30 to 50. Hurthle cell cancer may be a rare and potentially more aggressive sort of follicular thyroid cancer.
Anaplastic thyroid cancer. Anaplastic thyroid cancer is a rare type of thyroid cancer that begins in the follicular cells. It grows rapidly and is extremely difficult to treat. Anaplastic thyroid cancer typically occurs in adults age 60 and older.Medullary thyroid cancer. Medullary thyroid cancer begins in thyroid cells called C cells, which produce the hormone calcitonin. Elevated levels of calcitonin in the blood can indicate medullary thyroid cancer at a very early stage. Certain genetic syndromes increase the risk of medullary thyroid cancer, although this genetic link is uncommon.Other rare types. Other very rare sorts of cancer that start within the thyroid include thyroid lymphoma, which begins within the system cells of the thyroid, and thyroid sarcoma, which begins in the connective tissue cells of the thyroid.