The molecular genetic diagnosis confirmed the pre-ES clinical diagnosis, with detection of pathogenic variants in cystic kidney disease or nephronophthisis genes, including PKD1 (25), PKD2 (3), PKHD1 (25), NPHP3 (1), WDR19 (1), RPGRIP1L (1), BBS1 (1), BBS2 (1), and SDCCAG8 (1). The gene discussed is PKD2; the disease is cystic kidney disease.