If an infant begins projectile vomiting in the second to fourth week after birth, a primary care provider might suspect:

Question

Quizplus · Accepted Answer

Projectile vomiting in the second to fourth week after birth is a classic symptom of pyloric stenosis, a condition in which the muscle at the bottom of the stomach (pylorus) is thickened, blocking the flow of stomach contents into the small intestine. This can lead to dehydration, weight loss, and electrolyte imbalance. Cardiac stenosis, Hirschsprung disease, and cystic fibrosis are not typically associated with projectile vomiting in infancy.

If an Infant Begins Projectile Vomiting in the Second to Fourth