Cite this article as: Caklili OT, Metli K, Basmaz SE, Kurt AMO, Yesilyurt A. CHEK2 mutation with heterozygote c.592+3A>T variant in a patient with early breast and papillary thyroid cancer. Endocrinol Res Pract. Published online May 20, 2025. doi 10.5152/ erp.2025.25617.