congenital AE congenital diaphragmatic hernia AE SJ, YH WEB: http://medical-dictionary.thefreedictionary.com/aspiration 10061106 congenital diaphragmatic hernia AE is a congential disorder in which an absent or partially formed diaphragm results in an abnormal opening that allows the stomach and intestines to move into the chest cavity and crowd the heart and lungs. This crowding can lead to underdevelopment of the lungs, potentially resulting in life-threatening breathing difficulties that are apparent from birth.