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Pyloric Stenosis

This animation describes how pyloric stenosis, which is a narrowing where the stomach empties into the intestinal tract, is experienced . Pyloric stenosis generally occurs in babies 3 months to 3 weeks old.

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The animation shows a child's stomach. You can see the transition between the stomach and the small intestine. This is where the closing muscle called the pylorus is found. In pyloric stenosis, the muscle is thickened. This makes it difficult for the stomach contents to pass from the stomach into the small intestine. The result is vomiting, even projectile vomiting in the child. Pyloric stenosis generally occurs in babies from 3 weeks to 3 months old.