Patients with TNBC (p < 0.001; HR = 7.47 (95 % CI: 3.52–15.87) and HER2 overexpressing BC (p = 0.007; HR = 3.04 (95 % CI: 1.36–6.80) had the worst outcome of patients with bone-only metastases. Here, ERBB2 is linked to breast cancer.