A 6-week-old girl is brought to the physician by her mother because of a 6-day history of vomiting a small amount of milk 2 to 3 times daily. She appears well. She is at the 50th percentile for length and weight. Physical examination shows no abnormalities. Which of the following is the most likely cause of this patient's findings? A) Esophageal spasm B) Gut malrotation C) Immature lower esophageal sphincter D) Neuromuscular abnormality of the esophagus E) Pyloric stenosis F) Tracheoesophageal fistula
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The LES is a muscular ring at the lower end of the esophagus that acts as a valve between the esophagus and stomach. In infants, this sphincter may not be fully developed, which can allow food to flow back into the esophagus and cause vomiting. This condition, Show more…
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