Thyroid Cancer

The thyroid is a small, butterfly-shaped gland in the throat that controls the body’s heart rate, temperature and metabolism. Cancer of the thyroid gland can interrupt those vital functions, and lead to other complications. Fortunately, thyroid cancer can usually be successfully treated through minimally invasive methods. Thyroid tumors are somewhat common, and most are not cancerous. Cancer may develop as a result of age, exposure to radiation or a family history of goiters, cancer or other diseases. The thyroid is made up of follicular cells and C cells, either of which may develop cancer.

Risks Factors For Thyroid Cancer

The following may increase the risk of getting certain types of thyroid cancer:

  • Being between 25 and 65 years old
  • Being female
  • Being Asian or Caucasian
  • Having a family history of thyroid disease
  • Having a family history of precancerous polyps in the colon
  • Carrying an abnormal RET oncogene
  • Having had radiation treatments to the head or neck
  • Having a diet low in iodine

Types Of Thyroid Cancer

There are four types of cancer that develop in the thyroid gland, and one that develops in glands in the neck.

Papillary Cancer

The most common form of thyroid cancer, papillary cancer usually appears as a single mass in one lobe of the thyroid. It is slow-growing, but may spread to the lymph nodes. It is most common in women between 30 and 50 years old.

Follicular Cancer

The second-most-common form of thyroid cancer, follicular cancer usually remains in the thyroid gland. If it does spread, it is often to other parts of the body, such as the lungs and bones, rather than the lymph nodes.

Medullary Cancer

Accounting for about 2 percent of thyroid cancers, medullary cancer develops in the C cells of the thyroid gland. It may run in families, and can spread to other parts of the body even before a mass in the thyroid is discovered. The treatment outcome for this type of cancer is usually not as good as it is for papillary and follicular cancers.

Anaplastic Cancer

A rare form of thyroid cancer, anaplastic cancer accounts for about 1 percent of all cases. It is fast-growing, often spreads to other parts of the body, and is quite difficult to treat. It usually affects people older than 60.

Symptoms Of Thyroid Cancer

Symptoms or signs of thyroid cancer may include:

  • A bump or lump, or swelling, in the neck that may grow rapidly
  • Pain in the front of the neck that may run up to the ears
  • Hoarseness or other voice changes that do not go away
  • Difficulty swallowing
  • Wheezing or difficulty breathing
  • A constant cough that is not due to a cold

Diagnosis Of Thyroid Cancer

Thyroid cancer can be diagnosed through a series of tests. Once diagnosed, further testing can help determine the disease’s stage and whether or not it has spread. Diagnostic tests include:

  • Surgical biopsy
  • Ultrasound exam
  • CT or CAT scan
  • Laryngoscopy
  • Blood tests
  • Fine-needle-aspiration biopsy

Treatment Of Thyroid Cancer

Surgery is the most common treatment for thyroid cancer. It is the only way to ensure a complete removal of all cancer cells, and greatly reduce the risk of recurrence. Types of surgery may include:

  • Lobectomy, removal of the lobe in which the cancer is found
  • Near-total thyroidectomy, removal of all but a very small portion of the thyroid
  • Total thyroidectomy, removal of the entire thyroid
  • Lymphadenectomy, removal of any cancerous lymph nodes from the neck

Additional standard treatments may include radiation therapy, chemotherapy, thyroid hormone therapy and targeted therapy. Thyroid cancer may be slow-growing enough to allow treatment to be delayed. Those who choose to postpone treatment should be closely monitored by a physician.

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