[One case of the infratemporal fossa hydatid invading maxillary sinus].

Summary Male, 43 years old, Tibetan. Main reason: left eyesight impaired for one month. Nasal sinus CT: the 47 mm×44 mm cystic low density shadows can be seen in the left infratemporal fossa, the maxillary sinus cavity reduced under the pressurebase. The patient had the internal and external nasal endoscopic sinus resection of the left fossa.The patient's left eye sight recovered after the operation.Two weeks after the operation, the sinus was re-examined for CT, showing that the left inferior fossa was removed, but there was no significant difference in the maxillary sinus structure. Sixteen months after the operation, the CT showed that the left maxillary sinus is back to normal after absorbing the bone tissue.