[Idiopathic hypereosinophilic syndrome. Enterocolitis--a rare manifestation].

We describe a 44 year old male with severe enterocolitis as the dominating symptom of idiopatic hypereosinophilic syndrome. The clinical picture was dominated by incapacitating diarrhoea and abdominal cramps. A significant rise of eosinophils was found in peripheral blood. The patient was treated successfully using a combined regimen with hydroxyurea/steroids. We outline diagnosis, differential diagnosis and guidelines for treatment.