title: Orbital hydatid cyst.
abstract: A six-year-old Bantu child presented with a mass in the right orbital region, proptosis, and moderate pallor of the optic disk. Orbital exploration revealed an unsuspected hydatid cyst. The characteristic histopathologic features of the organism Echinococcus granulosus are emphasized.
mesh_terms: D002648:Child; D004443:Echinococcosis / Q000150:complications / Q000473:pathology / Q000601:surgery*; D005094:Exophthalmos / Q000175:diagnosis / Q000209:etiology / Q000601:surgery*; D006801:Humans; D008297:Male; D009896:Optic Atrophy / Q000209:etiology; D009916:Orbital Diseases / Q000175:diagnosis / Q000473:pathology / Q000601:surgery*; D013019:South Africa