THPS a Description thickening of the pyloric portion of the stomach causing obstruction of gastric outflow a Also called: IHPS hypertrophic pyloric stenosis congenital pyloric stenosisIHPS ◼ Description: ◼ thickening of the pyloric portion of the stomach causing obstruction of gastric outflow ◼ Also called: ◼ IHPS ◼ hypertrophic pyloric stenosis ◼ congenital pyloric stenosis