EGFR and glioblastoma: It targets the epidermal growth factor receptor and functions as a tumor suppressor in glioblastomas; it also targets Dickkopf‐1 in the Wnt/β‐catenin pathway, thereby functioning as an oncogene in tongue squamous cell, testicular germ cell, esophageal squamous cell, and prostate cancer (Jing et al., 2017; Voorhoeve et al., 2006; Wei et al., 2015; Weng et al., 2017).