Although the AUC values of NCAPG2 for a short-term (1 and 2-year) PFI survival ranged between 0.6 and 0.7 based on TCGA database, the survival analysis based on other databases (DKFZ2018, GSE70769, and MSKCC2010) showed a more significant prognostic value of NCAPG2 for PCa (Additional file 1: Figure S2g-i). This evidence concerns the gene NCAPG2 and posterior cortical atrophy.