TP53 rs1042522 polymorphism and early‑onset breast cancer

Background: Breast cancer is the leading cause of cancer deaths among women. Early‑onset breast cancer is well recognized as it clinically differs from old‑age diagnosed breast neoplasms. TP53 rs1042522 polymorphism relates to the risk of breast neoplasms, but this relationship in Turkish early‑onset breast cancer patients has not been investigated yet. We aimed to search the relationship between TP53 rs1042522 polymorphism and young Turkish breast cancer patients. Materials and Methods: Ninety‑six female breast cancer patients who were ≤ 40 years of age and 96 healthy controls were enrolled in our study. Participants were genotyped by the hybridization probe system. Results: We identified that the genotype frequencies of rs1042522 were significantly different between controls and cases (P = 0.027). Participants carrying CG genotype had also reduced breast cancer risk (odds ratio = 0.4196, 95% confidence interval: 0.1941–0.9067, P = 0.027). Our results revealed that there is an association between GG and CG + CC genotype groups with progesterone receptor (PgR) status (P = 0.0219). Conclusion: Our findings indicate that the CG genotype is a protective factor against breast neoplasms. No other clinicopathologic parameters except for PgR status were found to be related to rs1042522 polymorphism in young Turkish breast cancer patients.