Eosinophilic gastroenteropathies are not known to be fatal, but some types cause such severe bleeding or nutritional deficiency that the condition may be life-threatening if not treated with appropriate medications and support measures.
Infants with eosinophilic gastroenteropathies usually have acute reactions after food intake (within minutes to in one to two hours) that generally include nausea, vomiting and severe abdominal pain, later followed by diarrhea.
The eosinophil is a component of the immune system and is particularly involved with defense against parasites, but as of 2004 no parasite had been found responsible for any of the eosinophilic gastroenteropathies.
Pattern I eosinophilic gastroenteritis: Children affected with Pattern I EG have extensive infiltration of eosinophils in the area below the submucosa and muscularis layers.
Either term refers to three separate illnesses (listed in order of increasing severity): eosinophilic granuloma, Hand-Schuller-Christian disease, and Letterer-Siwe disease.