ERBB2 and breast carcinoma: Similarly, two prior studies found that breast cancers in the LIQ were associated with a shorter overall survival among Chinese women,44, 47 which can be explained by a higher rate of internal mammary lymph node metastasis for LIQ tumors.49 We further found that relative to luminal B subtype, luminal A breast cancer tended to occur in the UIQ, but HER2‐overexpressing breast cancer was less likely to occur in the central zone.