In addition, in the internal dataset, stromal tumor-infiltrating lymphocyte level (p < 0.001) and Ki-67 index (p = 0.012) were higher in the pCR group than in the non-pCR group, and there was an association between pCR and a lower clinical stage (p = 0.018), T category (p < 0.001), and N category (p < 0.001). The gene discussed is MKI67; the disease is neoplasm.