What is pyloric stenosis?

Stomach exit blockag: In a baby with hypertrophic pyloric stenosis (HPS), the circular pyloric muscle fibers which regulate the emptying of the stomach become swollen ("muscle-bound") usually between 2 and 8 weeks' age. The pyloric channel becomes blocked, and fluid cannot exit the stomach. The baby has progressive projectile nonbilious vomiting which can cause dehydration and weight loss if uncorrected.

Blockage of stomach: Pyloric stenosis is the thickening of the pyloric muscle at the outlet of the stomach. This in essence closes the stomach outlet, resulting in vomiting, sometimes projectile. Surgery to correct this condition, opens the muscle and allows the stomach to empty and normal digestion to follow.

Stomach obstruction: Pyloric stenosis is thickening or hypertrophy of pyloric muscle causing gastric outlet obstruction.Usually 3 to 6 weeks of age, more common in males.Projectile vomiting. forceful ejection of milk or formula up to several feet away,persistent hunger, increased stomach contractions, dehydration.changes in bowel movements, maintaining or loosing weight. Cure is usually incision into pyloric muscle.