Case Presentation J.S. is a 13-day-old Hispanic male, presenting to the pediatric emergency department with complaints of vomiting. His mother's chief complaint is "vomiting after feeds for the last four days; it happens after every single feed; after feeding, he vomits if he lies flat; he gags a lot; I took him to the pediatrician who suggested Pedialyte, but he continues to vomit and now it is very forceful." J.S. does not take any daily medications and is healthy otherwise.
