Total cases   n= 144   Pure DCISa n=110(%) IDCb n=34(%) Lymph nodes positive negative 0 110(100) 34(100) 0 ERc positive negative 82(74.5) 28(25.4) 19(55.8) 15(44.1) PgRd positive negative 88(80) 22(20) 21(61.7) 13(38.2) HER2e positive negative 41(37.3) 69(62.7) 16(47) 18(53) aPure DCIS, pure ductal carcinoma in situ b IDC, invasive ductal carcinoma c ER, estrogen receptor d PgR, progesterone receptor e HER2, human epidermal growth factor receptor 2

Table 5: Associations between patients with an diagnosis of Pure DCIS and IDC according to lymph nodes and triple receptor status.