Radiological findings in this case were suggestive of (preganglionic) trigeminal schwannoma with large tumor associated cyst. That was confirmed pathologically.

Trigeminal schwannomas are encapsulated tumors composed of schwann cells. They are the second most common intracranial schwannoma, far less common than vestibular schwannoma, and has a predominantly benign growth.

They are divided into:

• preganglionic: confined to the prepontine cistern and cerebellopontine angle cistern, like in our case

• ganglionic: confined to Meckel cave

• postganglionic: either confined to the cavernous sinus or extending through respective base of skull foramina, rarely confined to the extracranial compartment