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You are seeing a 2yo patient with 6 hours of intermittent episodes of apparent abdominal pain happening every 15-20 minutes, and non-bloody non-bilious vomiting. In between episodes, the child appears well and is playful. There is no fever, diarrhea, or concern for toxic ingestion. The child has a history of constipation with hard stools and occasional skipped days with no stooling. There is no other significant past medical history.

Which of the following is true of this child and his disease process?
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