RAB27B and ductal breast carcinoma in situ: According to the cutoff value, high expression of Rab27B was observed in 0 of 22 (0%) normal breast tissues, 5 of 40 (12.5%) FA tissues, 10 of 30 (33.3%) DCIS tissues, 107 of 221 (48.4%) BCs, and 30 of 40 (75.0%) metastatic LNs, respectively (P < 0.001, *Chi-square test, Table 2).