Non-IgE mediated immune reaction to<unk><unk> 
Peak incidence in infants 0-9 months
Cow's milk and soy (in patient's diet or maternal diet if breast fed) are most common culprits
Food protein-induced enterocolitis syndrome
Esophageal stenosis/atresia
Neutropenic enterocolitis 
Pyloric stenosis
Necrotizing enterocolitis
Intestinal stenosis/atresia
HIV diarrhea
Duodenal atresia