CT demonstrate a soft-tissue mass involving the geniculate and tympanic segments of the right facial nerve with expansion of the facial canal. No ossification or calcification is in identified within the mass.
Facial paresis is the most common presenting symptom of a facial nerve schwannoma.
However, facial nerve schwannomas are responsible for a small percentage of peripheral facial paresis. Facial schwannomas usually involve the intrapetrous segments of the nerve. Intracranial or parotid segment involvement is rare. The present case illustrates the most common location, the geniculate segment. Involvement of multiple contiguous segments is common, as this case also illustrates.