Hydatid disease has a high incidence in the countries of the temperate zone
s such as Turkey. Only few cases in the head and neck region have been repo
rted in the literature. Our case, an unusual localization of hydatidosis, i
.e. hydatid disease of the infratemporal fossa of a 9-year-old male patient
suffering from a swelling of the left maxillary region which was diagnosed
by CT, is presented. The lesion visualized on CT images was compressing th
e neighbouring structures. The possible diagnosis was made based on the ima
ges obtained from CT examination.