• Tatjana Bogović Crnčić, Maja Ilić Tomaš, Neva Girotto, and Svjetlana Grbac Ivanković.
• Department of Nuclear Medicine, University of Rijeka Faculty of Medicine, Clinical Department of Nuclear Medicine, Rijeka Clinical Hospital Centre, Rijeka, Croatia.
• Acta Clin Croat. 2020 Jun 1; 59 (Suppl 1): 66-72.

AbstractThyroid cancer (TC) is the most common endocrine cancer today. The rising incidence of the differentiated papillary type cannot be entirely explained by early and meticulous diagnosis, since a proportion of large tumors has also been reported. In this review, we present the results of numerous investigations focused on possible factors causing increased TC incidence, such as chromosomal and genetic alterations, iodine intake, TSH level, autoimmune thyroid disease, gender, estrogen, obesity, lifestyle changes, and environmental pollutants. Up to now, only childhood exposure to ionizing radiation has been fully recognized as a risk factor. There is also a possibility that yet undiscovered carcinogens, especially during intrauterine life or early childhood, might be responsible for increased TC incidence as well as epigenetic changes. Therefore, more studies are necessary in order to further investigate the potential risk factors for TC and their mechanisms of action.

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