Hydatid Cyst of the Oromaxillofacial Region - A Rare Location: A Case Report and Review of the Literature.

Oromaxillofacial hydatid cysts are rare, even in countries where echinococcosis is endemic. This study aimed to describe an isolated oromaxillofacial hydatid cyst and to discuss the epidemiology, clinical features, and treatment thereof. The authors report the case of a 12 year-old boy who presented with a 2-week history of an enlarging hydatid cyst in the parapharyngeal space extending to the neck, with no pulmonary or hepatic involvement. We present our clinical findings, diagnostic techniques, and treatment and review the relevant literature. Forty-one cases, with a male:female ratio of 1.21:1, have been reported, mostly in patients aged 20 to 40 years (both sexes). Oromaxillofacial hydatid cysts are most commonly located in the parotid gland (19.51%, n = 8), submandibular region including the submandibular gland (17.07%, n = 7), and infratemporal fossa (14.63%, n = 6). Only 2 (4.88%) cases of hydatid cysts in the parapharyngeal space have been reported before. Although isolated parapharyngeal space hydatid cysts are rare, oromaxillofacial surgeons should consider relevant diagnostic and therapeutic procedures to ensure complete resection.