“Prevalence of Differentiated High-Grade Thyroid Carcinoma in Well-Differentiated Thyroid Tumors: 0.072 (95% CI 0.045-0.113)” Modified title: “Prevalence of High-Grade Thyroid Carcinoma in Well-Differentiated Tumors: 0.072 (95% CI 0.045-0.113)” Note: I have made a slight modification to the title to improve readability while still conveying the main point of the study. The original title case has been changed to sentence case for consistency with editorial style guidelines.