The Catholic University Of Korea

Women's Thyroid Cancer Risk May Be Linked to Reproductive Lifespan and Hormone Therapy

- A nationwide Korean study of 5.7 million women found that longer reproductive lifespan is associated with progressively increased thyroid cancer risk. - Hormone replacement therapy use was linked to elevated thyroid cancer risk, with a stronger association observed among women receiving HRT for five years or more. - The study reported an incidence rate of approximately 2.4 per 1,000 people per year for thyroid cancer, with women disproportionately affected compared to men. - Researchers suggest that a woman's reproductive history, including menopause timing and hormone therapy use, could be considered in individual thyroid cancer risk assessment.