Thyroid cancer


thyroid cancer

any of various benign tumours (adenomas) or malignant tumours (cancers) of the thyroid gland. Most thyroid tumours are adenomas; these have a wide variation of cellular patterns. Most of the tumours have well-developed follicles; thus, they are collectively known as follicular adenomas. Most thyroid adenomas do not take up iodine or produce thyroid hormone. Thyroid cancer is relatively rare-only about 5 percent of all thyroid nodules are cancers, and only about 0.5 percent of all cancer deaths are from thyroid cancer. The peak incidence of thyroid cancer occurs at about 50 years of age, and women are affected about three times as often as men. Most thyroid cancers are composed of mature-looking thyroid cells, grow very slowly, and are rarely fatal.

Learn more about thyroid cancer with a free trial on

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
Cite This Source
Previous Definition: thyroid bruit
Next Definition: thyroid cartilage
Words Near: thyroid cancer
More from
Synonyms and Antonyms for thyroid cancer
More from
Search for articles containing thyroid cancer
More from Translator Word FAQs presents 366 FAQs, incorporating some of the frequently asked questions from the past with newer queries.

Copyright © 2014, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature