European Journal of Cardiovascular Medicine

Described as the most common cause of gastric outlet obstruction and the most common surgical cause of vomiting in infants, Hypertrophic Pyloric Stenosis (HPS) is defined as a hyperplasia of smooth muscle fibers of the pylorus that is responsible for the narrowing of the pyloric canal and obstruction of gastric emptying. It occurs at a rate of 1–4 per 1000 live births with a male to female ratio 4:1. The classic presentation of HPS is nonbilious, projectile vomiting in a full-term neonate with a classic presentation at 3 to 4 weeks of age. We report in here a delayed presentation of HPS in an infant aged 4 months who presented with projectile nonbilious recurrent episodes of post prandial vomiting, where history, examination and investigations supported the diagnosis of HPS and Ramstedt's pyloromyotomy was curative.