“…21,22 Consistent with this, our patient's first symptom was facial pain, presumed to be postherpetic neuralgia, but perhaps due to PNI. PNI occasionally can present as a superior orbital fissure syndrome, 23 orbital apex syndrome, 24 or serous otitis media. 25 Once a cranial nerve is invaded by malignant cells, spread occurs in an antegrade fashion toward the central nervous system.…”