EGFR and central nervous system cancer: Four studies [11, 16, 20, 24] focused on the association between EGFR rs730437, rs1468727, rs11506105, rs845552, rs12718945, rs17172432, rs3752651, rs4947492 polymorphisms and glioma risk, among which two studies [16, 20] also reported the alleles and genotypes of EGFR rs9642393 in patients with glioma and controls.