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Thyroid cancer
Introduction

Incidence

Thyroid cancer is the most common endocrine cancer. Estimated new cases and deaths from thyroid cancer in the United States in 2005:

  • New cases: 25,690.
  • Deaths: 1,490.

The incidence of thyroid nodules in the general population is 4%-7%, with nodules being more common in females than males. The prevalence of thyroid cancer in a solitary nodule or in multinodular thyroid glands is 10%-20%; this increases with irradiation of the neck in children and older men.

Between 1973 and 1997, the incidence of thyroid cancer increased by 24%, whereas mortality from this cancer decreased by 24%.

Gender

Women are affected more often than men (3:2 ratio).

Age

Most patients are between the ages of 25 and 65 years at the time of diagnosis of thyroid carcinoma.

Race and ethnicity

Asian race has been shown to be a risk factor.

Geography

Japan and Hawaii have shown a higher incidence of thyroid cancers.

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