Eosinophilic gastroenteritis presenting as acute abdomen.

Many causes of acute abdomen are diagnosed on computed tomography (CT). We present two cases of eosinophilic gastroenteritis that showed mural thickening of the stomach, duodenum, and/or proximal jejunum on CT. The correct diagnosis was made by checking the eosinophil count, and, in one case, unnecessary surgery was avoided.