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- diffuse hypertrophy and hyperplasia of the smooth muscle of the antrum of the stomach and pylorus. results in narrowing of the pyloric canal, which can then easily become obstructed.
- occurs in infants aged 2 – 8 weeks.
- common in males than in females.
- projectile vomiting in neonate (not billous)-normally occurs 30 – 60 minutes after a feed, with the baby
- remaining hungry
- 2-8 weeks
- weight loss
- infrequent/absent bowel movements may be seen.
- An enlarged pylorus, classically described as an ‘olive’, may be palpated in the right upper quadrant or epigastrium of the abdomen.
- Biochemistry: there is often hypochloraemic metabolic alkalosis with severe potassium depletion
- Ultrasound abdomen
- correction of fluid deficiency and electrolyte imbalance
- Surgical correction (pyloromyotomy)