ERBB2 and neoplasm: There were 6 significant variables constructed in the nomogram: age (18–49, 50–64, ≥65), tumor subtype (luminal A, luminal B, triple-negative, HER2 positive), chemotherapy (yes vs. no)), surgery (yes vs. no), the number of ECM sites (0, 1, 2, 3) and the median household income (high vs. low).