The prognostic factors significant for OS were: age (<60 vs. ≥60), KPS (<60 vs. 70–80 vs. 90–100), tumor subtype (TNBC the worst, ER/PR+ HER2+ the best), the number of BM (1 vs. >1) and ECM (present vs. absent). Here, ERBB2 is linked to neoplasm.