안와내 발생한 포충낭 1예

Hydatid Cyst of the Orbit

Purpose: Most hydatid cysts affecting humans grow in the liver and the lung, but orbital involvement is very rare. To our knowledge, this is the first report of a hydatid cyst of the orbit in Korea. Methods: A 33-year-old woman came to the hospital with a 2-month history of slowly progressive proptosis and ocular pain of the right eye. The right eye showed proptosis, visual impairment and mild limitation of abduction. Orbital CT and MRI revealed a 32×20×24-mm well-defined unilocular cyst in the retrobulbar, intraconal area of the right orbit. Results: The cyst was surgically removed with lateral orbitotomy and it ruptured just prior to the end of the operation. Complete aspiration of the cystic fluid and in situ irrigation with gentamicin-normal saline mixture were performed. Histopathological examination revealed a hydatid cyst. After surgery, the visual acuity and primary position of the right eye were recovered, but its abduction was mildly limited.