Fig. 7

Kaplan–Meier survival analysis of the signature for both the training cohort and the validation cohort. In Kaplan–Meier survival analysis, red curve represents the subgroup with higher risk score, and green curve represents lower risk score. Patients with a high risk score demonstrated a worse OS than those with a low risk score in the training cohort (a, d), internal validation cohort (b, e) and external validation cohort (c, f), which suggests the strong predictive ability for BM patient survival outcome