Bell's palsy MRI: Difference between revisions
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*Electrodiagnostic studies (EMG, or motor nerve conduction study) and Imaging (CT, or MRI) are needed if the physical signs are atypical, there is slow progression beyond three weeks, or if there is no improvement at six months. | *Electrodiagnostic studies (EMG, or motor nerve conduction study) and Imaging (CT, or MRI) are needed if the physical signs are atypical, there is slow progression beyond three weeks, or if there is no improvement at six months. | ||
*There is no test that provides prognostic information early enough to be used for guiding treatment or prognosis. | *There is no test that provides prognostic information early enough to be used for guiding treatment or prognosis. | ||
Swelling of facial nerve segments was found in patients with enhanced facial nerves from MRI. The swelling of the facial nerve in the labyrinthine segment in particular was identified in all patients with enhanced labyrinthine segments in MRI. The intraoperative swelling of geniculate ganglion of facial nerve was found in 78% of patients with enhanced facial segment in MRI (''p'' = 0.01). The intraoperative swelling of tympanic segment was observed from fourth to ninth weeks after the onset of palsy. | |||
=== Conclusion === | |||
MRI enhancement of facial nerves in Bell's palsy and Ramsay Hunt syndrome is associated with the extent of intratemporal lesions of facial nerves, especially in the labyrinthine segment. | |||
==References== | ==References== | ||
{{reflist|2}} | {{reflist|2}} | ||
Revision as of 19:30, 16 May 2018
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
MRI
- Electrodiagnostic studies help determine the prognosis, and imaging studies can define potential surgical causes of facial palsy.
- These tests are not necessary in all patients.
- Patients with a typical lesion that is incomplete and recovers do not need further study.
- Electrodiagnostic studies (EMG, or motor nerve conduction study) and Imaging (CT, or MRI) are needed if the physical signs are atypical, there is slow progression beyond three weeks, or if there is no improvement at six months.
- There is no test that provides prognostic information early enough to be used for guiding treatment or prognosis.
Swelling of facial nerve segments was found in patients with enhanced facial nerves from MRI. The swelling of the facial nerve in the labyrinthine segment in particular was identified in all patients with enhanced labyrinthine segments in MRI. The intraoperative swelling of geniculate ganglion of facial nerve was found in 78% of patients with enhanced facial segment in MRI (p = 0.01). The intraoperative swelling of tympanic segment was observed from fourth to ninth weeks after the onset of palsy.
Conclusion
MRI enhancement of facial nerves in Bell's palsy and Ramsay Hunt syndrome is associated with the extent of intratemporal lesions of facial nerves, especially in the labyrinthine segment.