normal facial nerve enhancement on MRI
nicht verwechseln mit: Neuritis Nervus facialisThe normal facial nerve (CN VII) can demonstrate some enhancement post gadolinium administration in up to 76% of examinations, and in ~70% of cases is asymmetric left-to-right. It has been attributed to the circumneural facial arteriovenous plexus.
Typical sites of enhancement:
- anterior genu (geniculate ganglion)
- posterior genu (between tympanic and mastoid segments)
- some enhancement can also be seen in the tympanic and mastoid segments.
- proximal greater superficial petrosal nerve
No enhancement should be seen in:
- cisternal segment (that in the cerebellopontine angle)
- meatal segment (that in the internal acoustic meatus)
- extracranial segment (beyond the stylomastoid foramen)
Siehe auch:
- geniculate ganglion
- cerebellopontine angle
- Gadolinium
- idiopathische Facialisparese
- periphere Fazialisparese MRT
- Neuritis Nervus facialis
- Fazialisparese
und weiter:
Assoziationen und Differentialdiagnosen zu normale Kontrastmittelanreicherung des Nervus facialis in der MRT:
