Recurrent Anaphylaxis: An Unruptured Splenic Hydatid Cyst as an Unusual Cause

Anaphylaxis is an acute onset systemic hypersensitivity reaction that may result in death. Drugs, idiopathic triggers, Hymenoptera venom and food are the most common causes of anaphylaxis. In patients with a recurrent history of anaphylaxis and elevated IgE levels without evident etiology, spontaneous hydatid cyst rupture should be considered, especially in endemic areas.