The analysis revealed that the STAT4 rs7601754 AG genotype decreases the odds of developing a T2 size carcinoma by approximately four times under the codominant (OR = 0.253, 95% CI: 0.106–0.605, p = 0.002) and the overdominant (OR = 0.255, 95% CI: 0.107–0.609, p = 0.002) models, while AG + GG genotypes are associated with decreasing these odds by 3.6-fold under the dominant model (OR = 0.277, 95% CI: 0.122–0.627, p = 0.002). The gene discussed is STAT4; the disease is carcinoma.