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Trigeminal Schwannoma

Last Updated: September 30, 2018

Trigeminal Schwannoma: Root Type

Trigeminal schwannomas are rare benign tumors representing the most common nonvestibular schwannoma, and 0.07 to 0.36% of all intracranial tumors. They may occur sporadically but case reports suggest patients with neurofibromatosis type 2 (NF-2) have an increased propensity to form these tumors in addition to the more commonly found vestibular schwannomas.

 Schwannomas emerge from the peripheral nerve sheath, distal to the oligodendroglia–Schwann cell junction. The trigeminal nerve (cerebellpontine angle) and the gasserian ganglion (cavernous sinus and Meckel’s cave) are the most common sites for intracranial schwannomas after the vestibular nerve. Similar to vestibular schwannomas, gross total resection of a trigeminal schwannoma portends a good progno...