Thyroid Awareness Month – Risk Factors for Thyroid Cancer

Most thyroid nodules are benign, and most people with thyroid nodules will never develop thyroid cancer.

Still, certain factors are associated with a higher risk and deserve closer evaluation.

☢️ Strongly Associated Risk Factors

Radiation exposure to the head and neck, especially during childhood or adolescence Prior therapeutic radiation for benign or malignant conditions Family history of thyroid cancer (especially first-degree relatives)

🧬 Genetic & Medical Factors

Certain inherited syndromes (rare, but important) Medullary thyroid cancer associated with RET mutations Autoimmune thyroid disease (e.g., Hashimoto’s thyroiditis) increases nodule prevalence; cancer risk remains low but evaluation is important

👥 Demographic Factors

Female sex (thyroid cancer is more common in women) Age (extremes of age can influence behavior and management)

🧠 Important clarification for patients

Having risk factors does NOT mean you have cancer.

➡️ Most patients with thyroid cancer have no identifiable risk factors.

➡️ Risk factors help guide how carefully we evaluate, not whether we panic.

🔍 What matters most?

High-quality ultrasound Appropriate biopsy when indicated Expert interpretation and risk-adapted management

👨‍⚕️ Dr. Rodrigo Arrangoiz, MD

Surgical Oncologist – Thyroid, Head & Neck, Breast

Mount Sinai Medical Center

📌 Take-home message:

Risk factors inform evaluation — ultrasound and pathology drive decisions.

📚 References

Haugen BR et al. ATA Guidelines for Thyroid Nodules and Differentiated Thyroid Cancer. Thyroid Schneider AB et al. Radiation exposure and thyroid cancer. J Clin Endocrinol Metab SEER Cancer Statistics Review

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