ERBB2 and breast cancer: On the other hand, hsa_circ_0084100 (circIKBKB), hsa_circ_0001944 (circBCBM), and hsa_circ_0007766 (circ-ERBB2) did not only show the potential to predict BC metastatic ability, but also BC intrinsic metastatic property and destination [139,141,146].