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Citation:
Gaillard F, Chan B, b, et al. Normal facial nerve enhancement on MRI. Reference article, Radiopaedia.org (Accessed on 23 Apr 2024) https://doi.org/10.53347/rID-1738
The normal facial nerve (CN VII) can demonstrate some enhancement post gadolinium, with the prevalence of which segments is highly variable depending on the MRI sequence 4-8. Enhancement may be asymmetric 4-6. It has been attributed to the circumneural facial arteriovenous plexus.c
Typical sites of enhancement 4-6:
No enhancement should be seen in normal facial nerves in the meatal segment (that in the internal acoustic meatus) or extracranial segment (beyond the stylomastoid foramen). The intracanalicular-labyrinthine segment typically does not usually enhance 9.
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