In contrast, concomitant DCIS (OR: 0.29; 95% CI: 0.21–0.38; p < 0.001), HER2-positivity (OR: 0.36; 95% CI: 0.21–0.61; p < 0.001), and moderate or high Ki67 (OR: 0.76; 95% CI: 0.58–0.98; p = 0.034; OR: 0.31; 95% CI: 0.19–0.52; p < 0.001, respectively) were found less frequently in ILC (Table 3). This evidence concerns the gene ERBB2 and ductal breast carcinoma in situ.