Last reviewed: November 2017
Last updated: August  2017

Summary

Definition

History and exam

Key diagnostic factors

  • first-born male infant
  • nonbilious projectile vomiting
  • 3 to 6 weeks old
  • upper abdominal mass
  • peristaltic waves

Other diagnostic factors

  • FHx of pyloric stenosis
  • multiple formula changes
  • tachycardia
  • decreased wet diapers
  • dry mucous membranes
  • flat or depressed fontanelles
  • constipation
  • poor weight gain
  • irritability

Risk factors

  • prematurity
  • first-born male infant
  • FHx pyloric stenosis
  • early exposure to erythromycin
  • maternal exposure to macrolides

Diagnostic investigations

1st investigations to order

  • chemistry panel
  • ultrasound abdomen
Full details

Treatment algorithm

ACUTE

Contributors

Authors VIEW ALL

Assistant Professor of Pediatric Surgery

Ann and Robert H. Lurie Children’s Hospital of Chicago

Chicago

IL

Disclosures

CJH declares that she has no competing interests.

Dr Catherine Hunter would like to gratefully acknowledge Dr Jeffrey S. Upperman, Dr Yigit S. Guner, and Dr Arturo Aranda, previous contributors to this monograph. JSU, YSG, and AA declare that they have no competing interests.

Peer reviewers VIEW ALL

Assistant Professor of Surgery

Department of Surgery

Division of Pediatric Surgery

NYU Medical Center

New York

NY

Disclosures

EN declares that he has no competing interests.

Emeritus Nuffield Professor of Paediatric Surgery

Institute of Child Health

University College

London

UK

Disclosures

LS declares that he has no competing interests.

Consultant in Paediatric and Neonatal Surgery

Royal Alexandra Children's Hospital

Brighton

UK

Disclosures

RH declares that she has no competing interests.

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