Survival analysis of AT/RTs based on molecular classification. (A) Kaplan-Meier survival plot of 17 patients with AT/RT, using the clusters identified by hierarchical clustering of 18 patients with AT/RT (see Fig. 1). One patient included in the clustering was lost to follow-up and is not included in the survival analysis. The difference between the 4 clusters was statistically significant (log rank P value <.001). Vertical ticks indicate censored survival observations. (B) Multivariate survival model (Cox regression analysis) was used with the same patients in (A) to assess the importance of cluster membership and diagnostic age in AT/RT survival.