Pyloric stenosis

Injury Disease Nutrition Poison Symptoms Surgery Test Special Topic

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Digestive system Pyloric stenosis

Overview Symptoms Treatment Prevention

Pyloric stenosis

Symptoms generally appear several weeks after birth:

• Vomiting
  • Usually mild at first, becoming progressively more forceful within one half hour of feeding
  • Projectile vomiting
• Infant appears constantly hungry
• Diarrhea (loose green stools)
• Wave-like motion of the abdomen shortly after feeding and just before vomiting occurs
• Dehydration (becoming more profound with the severity of the vomiting)
• Failure to gain weight or weight loss

• Abdominal fullness prematurely after meals
• Belching
• Apparent abdominal pain

Physical examination may show signs of dehydration. The infant may have a distended abdomen. Palpation of the abdomen may reveal the abnormal pylorus, which feels like an olive-shaped mass.

• A chemistry panel often reveals electrolyte imbalances.
• An ultrasound of abdomen may be the first imaging test performed.
• A barium X-ray reveals a distended stomach and narrowed pylorus.

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