Several studies suggested that the rs3787268 polymorphism was associated with an increased risk of breast cancer in the Chinese Han population [30] and the Hispanic population [31], while Fu and colleagues showed that a significant association was found between MMP9 rs3787268 GA + AA genotypes and poor disease‐free survival in Chinese breast cancer patients, but did not significantly increase the risk [29]. The gene discussed is MMP9; the disease is breast carcinoma.