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What You Need To Know About™

Thyroid Cancer

  • Posted: 10/26/2007

Introduction

This National Cancer Institute (NCI) booklet (NIH Publication No. 07-4994) is about cancer that begins in the thyroid. In 2012, more than 43,000 women and 13,000 men will be diagnosed with thyroid cancer in the United States.

This booklet tells about diagnosis, staging, treatment, and follow-up care. Learning about the medical care for thyroid cancer can help you take an active part in making choices about your own care.

This booklet has lists of questions that you may want to ask your doctor. Many people find it helpful to take a list of questions to a doctor visit. To help remember what your doctor says, you can take notes or ask whether you may use a tape recorder. You may also want to have a family member or friend with you when you talk with the doctor - to take part in the discussion, to take notes, or just to listen.



Glossary Terms

cancer (KAN-ser)
A term for diseases in which abnormal cells divide without control and can invade nearby tissues. Cancer cells can also spread to other parts of the body through the blood and lymph systems. There are several main types of cancer. Carcinoma is a cancer that begins in the skin or in tissues that line or cover internal organs. Sarcoma is a cancer that begins in bone, cartilage, fat, muscle, blood vessels, or other connective or supportive tissue. Leukemia is a cancer that starts in blood-forming tissue such as the bone marrow, and causes large numbers of abnormal blood cells to be produced and enter the blood. Lymphoma and multiple myeloma are cancers that begin in the cells of the immune system. Central nervous system cancers are cancers that begin in the tissues of the brain and spinal cord. Also called malignancy.
thyroid (THY-royd)
A gland located beneath the larynx (voice box) that makes thyroid hormone and calcitonin. The thyroid helps regulate growth and metabolism. Also called thyroid gland.
thyroid cancer (THY-royd KAN-ser)
Cancer that forms in the thyroid gland (an organ at the base of the throat that makes hormones that help control heart rate, blood pressure, body temperature, and weight). Four main types of thyroid cancer are papillary, follicular, medullary, and anaplastic thyroid cancer. The four types are based on how the cancer cells look under a microscope.