ERBB2 and aneurysmal bone cyst: ABC patients with HER2-enriched and Luminal B significantly increased the risk of liver metastasis (HR HER2-enriched 2.27, 95% CI 1.65-3.14, HR Luminal B 1.66, 95% CI 1.24–2.23), and the HRs remained statistically significant after extended adjustment to the model (HR HER2-enriched 2.14, 95% CI 1.47-3.12, HR Luminal B 1.40, 95% CI 1.01–1.96).