Narrowing of the opening from the stomach to the first part of the small intestine (the pylorus)

Clinical features

Symptoms

• Projectile vomiting without the presence of bile (vomiting milk), most often occurs after the baby is fed
• Keen to feed
• The typical age that symptoms become obvious is two to twelve weeks old, most commonly 6 weeks

Signs

• Signs of dehydration
• Peristalsis across the abdomen
• May feel abdomen mass

Investigations

• US scan upper abdomen

Management

• Surgery - pyloromyotomy (open or lap)