Main Text: (Cancer Cell 35, 504–518.e1–e7; March 18, 2019)In the originally published version of this article, a few errors were made in and related to Table S2. We analyzed 44 samples instead of 43 samples. The RPKM value for FGFR2 and FGFR3 was mistakenly copied as the RPMK value of FGFR1. The expression level of PTEN and FGFR2 was determined by mean value instead of median value, which for PTEN is 2.6 and for FGFR2 is 2.1. In the legend for Figure 1D, the orange rectangle indicates all radiation-sensitive samples in the PTEN high group showed low level of FGFR2 expression. The information in Table S2, the Figure 1D legend, and the “Analysis of patient derived GSC lines” section of the STAR Methods have now been corrected in the online article. We apologize for any confusion these errors may have caused.