
A 5-year-old boy with a history of asthma presented for a 1-year history of multiple episodes of emesis. What's the diagnosis?
Joyce C. Rabbat, MD, FAAAAI, FACAAI, FAAP, FACDS, is an associate professor of pediatrics and internal medicine in the Division of Allergy and Immunology at Loyola University Medical Center, Maywood, Illinois.

A 5-year-old boy with a history of asthma presented for a 1-year history of multiple episodes of emesis. What's the diagnosis?