KDR and congenital diaphragmatic hernia: Considering the IHC results, reduction of receptor expression in CDH after ventilation for 30 min corresponded to the decrease in MWT, and increase of the expression with the progress of the ventilatory time (60 and 90 min) corresponded to its increase, suggesting a central role of the VEGFR-2 in the pathogenesis of CDH-related PH.