Solomon DA, et al. Diffuse midline gliomas with histone H3-K27M mutation: a series of 47 cases assessing the spectrum of morphologic variation and associated genetic alterations. Brain Pathol. 2016;26(5):569–580. 8. Bonner ER, et al. Detection and monitoring of tumor associated circulating DNA in patient biofluids. J Vis Exp. 2019;(148):e59721. 9. Panditharatna E, et al. Clinically relevant and min- imally invasive tumor surveillance of pediatric dif - fuse midline gliomas using patient-derived liquid biopsy. Clin Cancer Res . 2018;24(23):5850–5859. 10.