A hydatid cyst in an unusual location-the infratemporal fossa.

Hydatid disease is a considerable health problem worldwide, but hydatid cysts in the infratemporal region are extremely rare, even where the parasite is endemic. Here we report on a 17-year-old female who presented with a benign swelling in the infratemporal fossa. During surgery a cystic mass was discovered and histopathologic examination confirmed the diagnosis of a hydatid cyst. Although rare, a hydatid cyst should be considered in a differential diagnosis of benign swellings in the maxillofacial region. Physicians should exercise a high index of suspicion even in nonendemic locations.