Primary Intra-Orbital Hydatid Cyst: A Case Report of a Rare Cause of Exophthalmos.

Orbital hydatid cyst is an extremely rare presentation of human Echinococcus granulosus infection. However, it should be considered one of the differential diagnoses among patients living in an endemic area and presenting with proptosis of the eye. A preoperative course of anthelmintic followed by surgical excision of the cyst is the definitive management.