Ultrasoud (Hypertrophic Pyloric Stenosis)

Ultrasound performed in a 4-week-old boy because of projectile vomiting and frowning. Cross-section of the pylorus: The whole diameter (+ +) and the thickness of the wall (.+) of the pylorus are abnormally large (a wall thickness of 4 mm or more is pathological). With these findings the suspected diagnosis of hypertrophic pyloric stenosis is confirmed. Except for blood examinations (electrolytes, pH, etc.), additional examinations are unnecessary in case of clear history / clinical findings.