Geniculate ganglion Facial nerve schwannoma is not a common tumor. Among tumors arising from geniculate ganglion, facial nerves are the second most common after hemangioma. The most common symptom is facial paralysis. The DD include: meningioma, dural metastasis, epidermoid, hemangioma of geniculate ganglion. The key diagnostic features of schwannoma include: benign remodeling and widening of geniculate ganglion on CT, avid enhancing lesion.