A 5-year-old has a history of chronic recurrent abdominal pain and emesis. A diagnosis of cyclic vomiting was made at 3 years of age. Therapy with antimigraine medications was unsuccessful. During each episode, the serum ammonia, pH, glucose, and bicarbonate were normal. He now manifests bile-stained emesis, a tender distended abdomen, and bright-red blood per rectum. The most likely diagnosis is

A 5-year-old has a history of chronic recurrent abdominal pain and emesis. A diagnosis of cyclic vomiting was made at 3 years of age. Therapy with antimigraine medications was unsuccessful. During each episode, the serum ammonia, pH, glucose, and bicarbonate were normal. He now manifests bile-stained emesis, a tender distended abdomen, and bright-red blood per rectum. The most likely diagnosis is

An 18-month-old white male manifests failure to thrive, poor appetite, abdominal distention, diarrhea, and irritability. He had been well until 9 months of age.

A 12-year-old black female presents with malaise, fatigue, anorexia, and jaundice. The differential diagnosis should include all of the following EXCEPT

Matching: Constipation

Nondigestive causes of vomiting include all of the following EXCEPT