Compared with the low-risk group, the intermediate- and high-risk group presented with a higher rate of HR and HER2 negativity, a short MFI, extrahepatic metastasis, liver metastasis tumor load, and abnormalities in hemoglobin levels or liver function (all Ps ≤ 0.001), suggesting that these factors might affect the prognosis of BCLM. The gene discussed is ERBB2; the disease is neoplasm.