[Anaphylactic shock during excision of an intraosseous Echinococcus granulosus cyst]

During the excision of a cystic tumor of the left proximal thigh under general anesthesia a severe anaphylactic shock was observed in a patient. This severe allergic reaction was due to the puncture of an Echinococcus granulosus hydatid during the preparation of a bone-plate covering the bony cyst of the left thigh.