Eosinophilic gastroenteritis (EG or EGE), also known as eosinophilic enteritis, is a rare and heterogeneous condition characterized by patchy or diffuse eosinophilic infiltration of gastrointestinal tissue, first described by Kaijser in 1937.Kaijser R. Zur Kenntnis der allergischen Affektionen des Verdauugskanals vom Standpunkt des Chirurgen aus.