The Instituto Nacional do Câncer (Inca) in Brazil has projected a staggering number of new thyroid cancer cases for the years 2026 to 2028, estimating 13,310 cases among women compared to 3,140 cases among men, resulting in an approximate ratio of 4 to 1. This notable disparity highlights a broader global trend indicating that women are increasingly diagnosed with thyroid cancer. Experts suggest that hormonal influences, such as those associated with pregnancy or conditions like obesity, could be significant contributing factors to this rise in cases among women.

Aline Lauda, the coordinator of the Head and Neck Tumor Committee of the Sociedade Brasileira de Oncologia Clínica (Sboc), emphasizes the proactivity observed in women regarding health screenings and diagnostics. She notes that women are more inclined to seek medical examinations, with gynecologists frequently recommending thyroid ultrasounds during routine check-ups. This proactive approach may significantly influence early detection rates, leading to a higher number of reported cases among women.

Despite thyroid cancer being the fifth most common type of cancer in Brazil, Lauda insists that the increased incidence among women serves as a reminder of the importance of regular health check-ups and awareness surrounding the disease. The findings from Inca encourage further investigation into the underlying causes and underline the necessity of targeted educational campaigns that can support women in managing their thyroid health effectively.