A 4 week old boy has episodes of vomiting since birth. The vomiting occurs soon after feeding. He does not vomit after every feed and it is not related to the amount he takes. He is otherwise well and is gaining weight appropriately.
Which is the most likely diagnosis?
- Cows milk protein allergy
- Gastro-oesophageal reflux
- Lactose intolerance
- Pyloric stenosis
- Urinary tract infection