Bell's palsy MRI: Difference between revisions

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==Overview==


{{CMG}}


==MRI==
==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 findings are not specific and necessary for diagnosis of Bell's palsy.<ref name="pmid21847333">{{cite journal| author=Murthy JM, Saxena AB| title=Bell's palsy: Treatment guidelines. | journal=Ann Indian Acad Neurol | year= 2011 | volume= 14 | issue= Suppl 1 | pages= S70-2 | pmid=21847333 | doi=10.4103/0972-2327.83092 | pmc=3152161 | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=21847333  }} </ref>
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.
* Findings on MRI suggestive of of Bell's palsy include:
**Swelling of facial nerve<ref name="pmid18159587">{{cite journal| author=Kim IS, Shin SH, Kim J, Lee WS, Lee HK| title=Correlation between MRI and operative findings in Bell's palsy and Ramsay Hunt syndrome. | journal=Yonsei Med J | year= 2007 | volume= 48 | issue= 6 | pages= 963-8 | pmid=18159587 | doi=10.3349/ymj.2007.48.6.963 | pmc=2628199 | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=18159587  }} </ref><ref name="pmid21847333">{{cite journal| author=Murthy JM, Saxena AB| title=Bell's palsy: Treatment guidelines. | journal=Ann Indian Acad Neurol | year= 2011 | volume= 14 | issue= Suppl 1 | pages= S70-2 | pmid=21847333 | doi=10.4103/0972-2327.83092 | pmc=3152161 | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=21847333  }} </ref>
**Intraoperative swelling of geniculate ganglion of facial nerve<ref name="pmid18159587">{{cite journal| author=Kim IS, Shin SH, Kim J, Lee WS, Lee HK| title=Correlation between MRI and operative findings in Bell's palsy and Ramsay Hunt syndrome. | journal=Yonsei Med J | year= 2007 | volume= 48 | issue= 6 | pages= 963-8 | pmid=18159587 | doi=10.3349/ymj.2007.48.6.963 | pmc=2628199 | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=18159587  }} </ref>
*[[MRI]] also may be helpful in the diagnosis of other causes of [[facial nerve palsy]].<ref name="pmid23766904">{{cite journal| author=Gupta S, Mends F, Hagiwara M, Fatterpekar G, Roehm PC| title=Imaging the facial nerve: a contemporary review. | journal=Radiol Res Pract | year= 2013 | volume= 2013 | issue=  | pages= 248039 | pmid=23766904 | doi=10.1155/2013/248039 | pmc=3676972 | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=23766904  }} </ref>


==References==
==References==
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{{Reflist|2}}
[[Category:Neurological disorders]]
[[Category:Otolaryngology]]
[[Category:Neurology]]
[[Category:Needs content]]
[[Category:Needs overview]]
[[Category:Primary care]]
[[Category:Disease]]


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Revision as of 19:47, 16 May 2018

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Mohamadmostafa Jahansouz M.D.[2]

Overview

MRI

  • MRI findings are not specific and necessary for diagnosis of Bell's palsy.[1]
  • Findings on MRI suggestive of of Bell's palsy include:
    • Swelling of facial nerve[2][1]
    • Intraoperative swelling of geniculate ganglion of facial nerve[2]
  • MRI also may be helpful in the diagnosis of other causes of facial nerve palsy.[3]

References

  1. ↑ 1.0 1.1 Murthy JM, Saxena AB (2011). "Bell's palsy: Treatment guidelines". Ann Indian Acad Neurol. 14 (Suppl 1): S70–2. doi:10.4103/0972-2327.83092. PMC 3152161. PMID 21847333.
  2. ↑ 2.0 2.1 Kim IS, Shin SH, Kim J, Lee WS, Lee HK (2007). "Correlation between MRI and operative findings in Bell's palsy and Ramsay Hunt syndrome". Yonsei Med J. 48 (6): 963–8. doi:10.3349/ymj.2007.48.6.963. PMC 2628199. PMID 18159587.
  3. ↑ Gupta S, Mends F, Hagiwara M, Fatterpekar G, Roehm PC (2013). "Imaging the facial nerve: a contemporary review". Radiol Res Pract. 2013: 248039. doi:10.1155/2013/248039. PMC 3676972. PMID 23766904.

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