The ITF is a difficult-to-access space between the skull base, lateral pharyngeal wall, and ramus of the mandible. It is bounded anteriorly by the posterolateral wall of the maxillary sinus; posteriorly, by the carotid sheath; laterally, by the ramus of the mandible; medially, by the lateral pterygoid plate, tensor veli palatini, and levator veli palatini; superiorly, by the greater wing of the sphenoid; and inferiorly, by the medial pterygoid muscle. The medial border of the infratemporal fossa is continuous with the pterygopalatine fossa.1
The differential diagnosis of an ITF mass typically includes various tumors, such as juvenile nasopharyngeal angiofibroma, parotid tumors, and schwannoma.2 In rare cases, encephaloceles can present in the ITF. Diagnosis of ITF lesions can often be delayed because symptoms are vague, and there are few examination findings that suggest this specific diagnosis.