Intracranial arachnoid cyst on dental radiography: a diagnostic challenge.

Intracranial arachnoid cysts (IACs) can present as congenital asymptomatic lesions that may predispose them to present as an incidental finding during radiographic examination. On the other hand, IACs may also give rise to a series of neurologic symptoms depending on their size and location, such as vomiting, seizures, headache, and ataxia. Skull deformities, including macrocephaly, may occur and become remarkable on dental radiology. We report 2 patients who were identified with IAC before orthodontic treatment. The dental radiologic appearance of IAC is discussed and may constitute a diagnostic challenge to both the dentist and radiologist.