A case of eosinophilic peritonitis in which ascites interleukin 5 presented at a high level.

A 17-year-old girl was admitted to Handa City Hospital presenting with nausea, vomiting, diarrhea, and abdominal pain. Cytological examination of the ascites and the increased eosinophil count in the peripheral blood led to the diagnosis of eosinophilic peritonitis. Serum concentrations of interleukin 5 and interleukin 3 were normal, while only interleukin 5 level in the ascites presented at a high level; interleukin 5 at the affected part may be specifically related to the intestinal recruitment of eosinophils in this disease.