Fig. 4

Kaplan–Meier survival curves according to tumor locations. a Median progression-free survival of the cohort (n = 77) was 9.9 ± 1.0 (7.9–11.9, 95% CI) months. Thalamus (n = 43), 9.8 months; Brainstem (n = 18), 11.0 months; Spinal cord (n = 9), 9.1 months; Others (n = 7), 8.7 months. b Median overall survival (mOS) of the cohort (n = 87) was 16.6 ± 1.4 (13.9–19.3, 95% CI) months. Thalamus (n = 43), 19.2 months; Brainstem (n = 22), 12.4 months; Spinal cord (n = 12), 16.0 months; Others (n = 10), 12.0 months