The statistic significant indicators of the patients with PD‐DCIS were age at diagnosis (P < 0.001, HR = 0.309, 95% CI, 0.203–0.469), marital status (P < 0.001, not married, HR = 0.504, 95% CI, 0.269–0.945), tumor size (P < 0.001), lymph node status (P < 0.001, positive, HR = 0.546, 95% CI, 0.424–0.704), HER2 status (P = 0.004, positive, HR = 9.502, 95% CI, 2.758–32.734), and radiation or not P = 0.001, yes, HR = 2.183, 95% CI, 0.688–6.922). Here, ERBB2 is linked to ductal breast carcinoma in situ.