TBC1D9 and ductal breast carcinoma in situ: We found that the low expression of TBC1D9 was inversely correlated with tumor size in all BC tissue samples (rho = −0.25, p = 0.02) and in IDC (rho = −0.22, p = 0.06), non-TNBC including DCIS (rho = −0.49, p = 0.01), and non-TNBC (rho = −0.80, p = 0.01) tissue samples, but not in TNBC (rho = −0.14, p = 0.29) (Table 1).