Mastoiditis MRI: Difference between revisions

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==Overview==
==Overview==
In mastoiditis, [[MRI]] plays a role in the detection of [[cholesteatoma]] and when intracranial or intratemporal complications are suspected. Specifically, [[MRI]] has shown superiority in assessing the severity of intracranial involvement and [[abscess]] border visualization. Both [[CT-scans|CT]] and [[MRI]] are used in the evaluation of mastoiditis and its complications.


==MRI==
==MRI==
On [[MRI]] scan of the head, orbital cellulitis is characterized by hypointense signal on [[T1 relaxography|T1]]-weighted images, and hyperintense signal on T2-weighted images.<sup>[[Orbital cellulitis MRI#cite note-radiopaedia-1|[1]]]</sup> [[MRI]] has demonstrated equivilance to [[CT]] in diagnosing [[orbital disease]] and is equally accepted as a [[Gold standard (test)|gold standard]] diagnostic imaging modality.<sup>[[Orbital cellulitis MRI#cite note-pmid19696266-2|[2]]][[Orbital cellulitis MRI#cite note-merckmanualorbitalcellulitis-3|[3]]]</sup> Although an [[MRI]] scan is safer in children since there is no [[radiation]] exposure, the long acquisition time and the need for prolonged sedation make [[CT]] scan the imaging modality of choice.<sup>[[Orbital cellulitis MRI#cite note-eyewikiorbitalcellulitis-4|[4]]]</sup> After a diagnosis is made, [[MRI]] has shown superiority in assessing the severity of intracranial involvement and [[abscess]] border visualization
In mastoiditis, [[MRI]] plays a role in the detection of [[cholesteatoma]] and when intracranial or intratemporal complications are suspected. Specifically, [[MRI]] has shown superiority in assessing the severity of intracranial involvement and [[abscess]] border visualization. Both [[CT-scans|CT]] and [[MRI]] are used in the evaluation of mastoiditis and its complications.<ref name="pmid22695997">{{cite journal |vauthors=Trojanowska A, Drop A, Trojanowski P, Rosińska-Bogusiewicz K, Klatka J, Bobek-Billewicz B |title=External and middle ear diseases: radiological diagnosis based on clinical signs and symptoms |journal=Insights Imaging |volume=3 |issue=1 |pages=33–48 |year=2012 |pmid=22695997 |pmc=3292638 |doi=10.1007/s13244-011-0126-z |url=}}</ref><ref name="pmid18617870">{{cite journal |vauthors=van den Aardweg MT, Rovers MM, de Ru JA, Albers FW, Schilder AG |title=A systematic review of diagnostic criteria for acute mastoiditis in children |journal=Otol. Neurotol. |volume=29 |issue=6 |pages=751–7 |year=2008 |pmid=18617870 |doi=10.1097/MAO.0b013e31817f736b |url=}}</ref>
* partial-to-complete opacification of the mastoid air cells +/- middle ear cleft
* fluid signal intensity in the mastoid should not be interpreted as mastoiditis without other evidence, such as mucosal contrast enhancement and/or diffusion restriction
*


==References==
==References==
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[[Category:Emergency mdicine]]
[[Category:Disease]]
[[Category:Up-To-Date]]
[[Category:Infectious disease]]
[[Category:Otolaryngology]]
[[Category:Surgery]]

Latest revision as of 22:39, 29 July 2020

Mastoiditis Microchapters

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

Overview

In mastoiditis, MRI plays a role in the detection of cholesteatoma and when intracranial or intratemporal complications are suspected. Specifically, MRI has shown superiority in assessing the severity of intracranial involvement and abscess border visualization. Both CT and MRI are used in the evaluation of mastoiditis and its complications.

MRI

In mastoiditis, MRI plays a role in the detection of cholesteatoma and when intracranial or intratemporal complications are suspected. Specifically, MRI has shown superiority in assessing the severity of intracranial involvement and abscess border visualization. Both CT and MRI are used in the evaluation of mastoiditis and its complications.[1][2]

References

  1. Trojanowska A, Drop A, Trojanowski P, Rosińska-Bogusiewicz K, Klatka J, Bobek-Billewicz B (2012). "External and middle ear diseases: radiological diagnosis based on clinical signs and symptoms". Insights Imaging. 3 (1): 33–48. doi:10.1007/s13244-011-0126-z. PMC 3292638. PMID 22695997.
  2. van den Aardweg MT, Rovers MM, de Ru JA, Albers FW, Schilder AG (2008). "A systematic review of diagnostic criteria for acute mastoiditis in children". Otol. Neurotol. 29 (6): 751–7. doi:10.1097/MAO.0b013e31817f736b. PMID 18617870.

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