[Food protein-induced enterocolitis syndrome in a boy with diarrhoea and severe dehydration].

Food protein-induced enterocolitis syndrome (FPIES) is a rare non-IgE mediated condition. Symptoms of acute FPIES include vomiting, diarrhoea and dehydration. Symptoms are often misread as acute abdomen or sepsis. The condition can be fatal. There are no biomarkers for FPIES, and skin prick test for cow milk is often negative. Treatment is hydrolysed formula milk. This case story describes a one-month-old boy with diarrhoea and an output of up till 2.3 l per day. With this case story we wish to increase the knowledge of FPIES and emphasize the importance of having the diagnosis in mind when confronted with the very ill, dehydrated infant.