A rare cause of unilateral hypoglossal nerve palsy: case report of intraneural ganglion cyst of the hypoglossal nerve and review of the literature.

Benign lesions of the soft tissue arising in the periarticular space, such as a ganglion cyst, can cause compression of adjacent nerve fascicles passing in the nearby joint space. Intraneural ganglion cysts involving the cranial nerves are particularly rare, with only a few previous cases reported in the literature.