A recent study conducted by researchers affiliated with Hospital de Amor and the International Agency for Research on Cancer (IARC) has found that mortality rates for thyroid cancer are similar across different regions and income groups. The study suggests that overdiagnosis in higher-income areas may be responsible for the observed trends. Thyroid cancer, which is more common among women, is on the rise in middle-income countries due to improved screening methods. The study was supported by FAPESP.
Reviewed by Megan Craig, M.Sc.Oct 31 2023 Mortality rates are similar across regions and income groups, however.
FAPESP supported the study via two projects , Thyroid cancer is the most common endocrine system cancer and is more frequent among women, who account for 5% of cases diagnosed worldwide. Almost 600,000 new cases were reported in 2020, and more than 40,000 people died from the disease, according to IARC.
The authors of the Endocrine Practice article compared the geographical and socioeconomic distribution of thyroid cancer in the 18 municipalities of the Barretos region in the period 2003-17 with corresponding data for 2001-2015 in São Paulo City, where access is far easier to thyroid function tests and ultrasound, MRI and CT scans. They found a striking discrepancy: São Paulo's incidence was 15.9 per 100,000 inhabitants, three times that of the Barretos region .
Related StoriesImportantly, incidence rates in the Barretos region did not vary significantly across different income groups, indicating uniform diagnostic practices, whereas in São Paulo they rose in line with socioeconomic status, reaching 31.6 in the most affluent areas, as opposed to 8.1 in the poorest.
Thyroid Cancer Mortality Rates Regions Income Groups Overdiagnosis Screening FAPESP Research
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