From further analysis of the effects of them in the positive lymph nodes on the prognosis of BC patients, we found that the DFS of BC patients with low FOXP3+ Tregs and high MPI in the metastatic lymph nodes was better than that of patients with high FOXP3+ Tregs and low MPI; however, the difference was not statistically significant. The gene discussed is FOXP3; the disease is breast cancer.