Thyroid cancer is the most pervasive endocrine cancer worldwide.
1 During the past decades, published studies reported that the incidence of thyroid cancer continues to increase
2 in countries and regions such as Canada,
3 the US,
4 Australia,
5 Asia,
6-8 South America,
9 and Europe.
10-13 Although some regional studies have provided data on the incidence and mortality associated with thyroid cancer,
14,15 studies on thyroid cancer examining the association between the disease and country, sex, age, sociodemographic index (SDI), and other factors are lacking. Comprehensive, in-depth analysis of thyroid cancer in all regions of the world based on a variety of factors may be beneficial for health care planning and resource allocation.