Review Question - QID 105403

A 5-year-old male is brought to the pediatrician by his mother, who relates a primary complaint of a recent history of five independent episodes of vomiting over the last 10 months, most recently 3 weeks ago. Each time, he has awoken early in the morning appearing pale, feverish, lethargic, and complaining of severe nausea. This is followed by 8-12 episodes of non-bilious vomiting over the next 24 hours. Between these episodes he returns to nor...