“…Intradural lesions are more common in the posterior fossa around the cerebellar vermis and the fourth ventricle, in the spinal canal, and, less frequently, in the supraparasellar, pineal, and parapontine regions. 7 12 13 Extradural lesions have been reported in the fontanels, periorbital, nasal, frontotemporal, eustachian tube, parietal, occipital, cavernous sinus, and petrous apex locations. 11 14 15 16 17 They tend to originate from skull sutures located near the skin and have direct connections between the dermal sinus and intradural cyst.…”