Inferiorly located retrobulbar hydatid cyst: CT and MRI features.

Orbital hydatid cyst is rare. Hydatid cysts in other organ systems are not mentioned in the previous papers emphasizing an orbital hydatid. Four cases of inferiorly located retrobulbar hydatid cysts have been reported previously. We present a rare inferiorly located retrobulbar hydatid cyst case in a Turkish child that also had multiple hydatid lesions in the lungs and the liver. We present the orbital CT and MRI findings. Preoperative diagnosis is important to avoid cyst rupture. Although hydatid disease is prevalent in South America, Australasia, the Middle East and Mediterranean countries, increased travel-isolated cases can be seen anywhere in the world.