A schwannoma that involves the trigeminal nerve. The disease is trigeminal schwannoma (MONDO_0002555). Also known as: fifth cranial nerve neurilemmoma, fifth cranial nerve schwannoma, neurilemmoma of fifth cranial nerve, neurilemmoma of the fifth cranial nerve, neurilemmoma of the trigeminal nerve, neurilemmoma of trigeminal nerve, schwannoma of fifth cranial nerve, schwannoma of the fifth cranial nerve.