In addition, Studies by Pan et al. have shown that the CNVs of PGAP3, GRB7, MIR4728, PNMT, STARD3, TCAP, and ERBB2 play an important role in the accurate diagnosis of breast cancer subtypes, which further reveals the differences between these subtypes and improves the accuracy of breast cancer diagnosis [7]. The gene discussed is GRB7; the disease is breast carcinoma.