This site is intended for healthcare professionals

2437 pages added, reviewed or updated during the last month (last updated: 22/4/2021)

2437 pages added, reviewed or updated during the last month (last updated: 22/4/2021)


Medical search

infantile pyloric stenosis (PS)

FREE subscriptions for doctors and students... click here
You have 3 more open access pages.

Infantile pyloric stenosis occurs in neonates; it is acquired in the early stages of life, it was at one time thought to be a purely congenital condition.

  • the child with pyloric stenosis usually presents at 3 to 4 weeks of age. In rare instances symptoms may be present at or soon after birth, but this condition rarely presents for the first time in infants over the age of 12 weeks

  • the classic symptom of this condition is projectile vomiting. The vomitus does not contain bile and the child remains hungry and takes food immediately after vomiting
    • the neonate vomits large quantities of curdled and unpleasant smelling milk. The vomit is forcefully ejected, justifying the adjective "projectile"

Possible features of clinical examination include:

  • distended stomach and a smooth ovoid mass just below the right costal margin, which is the hypertrophied pylorus

Last reviewed 02/2020

Links: