Association analysis of the promoter methylation level of cyclic GMP-AMP synthase (cGAS)/mitochondrial antiviral-signaling (MAVS)/tumor necrosis factor receptor-associated factor 3 (TRAF3) gene with the risk on cervical precancerous lesion (CPL), and cervical cancer (CC). Here, CGAS is linked to congenital pulmonary lymphangiectasia.