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==Overview==
==Overview==
Although both [[MRI]] and [[CT]] scan may be used to help in the [[diagnosis]] of ''[[Listeria monocytogenes]]'' lesions, [[MRI]] is a more [[sensitivity|sensitive]] method to detect listerial lesions in the [[cerebellum]], [[brainstem]] and [[cortex]].<ref name="pmid8507761">{{cite journal| author=Armstrong RW, Fung PC| title=Brainstem encephalitis (rhombencephalitis) due to Listeria monocytogenes: case report and review. | journal=Clin Infect Dis | year= 1993 | volume= 16 | issue= 5 | pages= 689-702 | pmid=8507761 | doi= | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=8507761  }} </ref>  High-signal lesions on T2-weighted images and enhancing lesions on T1-weighted images can be identified in the [[cerebral]] [[parenchyma]] on MRI following administration of IV contrast.  Since [[brainstem]] involvement on MRI coupled with proper clinical setting is strongly suggestive of infection by ''[[Listeria monocytogenes]]'' , it is helpful to use contrast [[MRI]] in all patients presenting with listerial [[meningitis]], listerial [[bacteremia]], [[CNS]] signs and symptoms or suspicion of intracranial [[listeriosis]].
[[Brain]] [[MRI]] may be helpful in the [[diagnosis]] of ''[[Listeria monocytogenes]]'' brain lesions. Findings on [[MRI]] suggestive of listeriosis include lesions in the [[cerebellum]], [[brainstem]], and [[cortex]].<ref name="pmid8507761">{{cite journal| author=Armstrong RW, Fung PC| title=Brainstem encephalitis (rhombencephalitis) due to Listeria monocytogenes: case report and review. | journal=Clin Infect Dis | year= 1993 | volume= 16 | issue= 5 | pages= 689-702 | pmid=8507761 | doi= | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=8507761  }} </ref>  High-signal lesions on T2-weighted images and enhancing lesions on T1-weighted images can be identified in the [[cerebral]] [[parenchyma]] on [[MRI]] following administration of [[IV]] [[Contrast medium|contrast]]With a high pre-test probability, [[brainstem]] involvement on [[MRI]] is strongly suggestive of listeriosis. Contrast [[MRI]] is recommended among all patients presenting with listerial [[meningitis]], listerial [[bacteremia]], suggestive [[CNS]] signs and symptoms or upon suspicion of intracranial [[listeriosis]].
==MRI==
*Brain [[MRI]] may be helpful in the [[diagnosis]] of ''[[Listeria monocytogenes]]'' brain lesions. Findings on [[MRI]] suggestive of listeriosis include lesions in the [[cerebellum]], [[brainstem]], and [[cortex]].<ref name="pmid8507761">{{cite journal| author=Armstrong RW, Fung PC| title=Brainstem encephalitis (rhombencephalitis) due to Listeria monocytogenes: case report and review. | journal=Clin Infect Dis | year= 1993 | volume= 16 | issue= 5 | pages= 689-702 | pmid=8507761 | doi= | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=8507761  }} </ref>
*High-signal lesions on T2-weighted [[MRI]] images and enhancing lesions on T1-weighted [[MRI]] images can be identified in the [[cerebral]] [[parenchyma]] following administration of [[IV]] [[Contrast medium|contrast]].
*With a high pre-test probability, [[brainstem]] involvement on [[MRI]] is strongly suggestive of listeriosis.
*Since [[brainstem]] involvement on [[MRI]] is strongly suggestive of listeriosis, contrast [[MRI]] is recommended among all patients presenting with listerial [[meningitis]], listerial [[bacteremia]], suggestive [[CNS]] signs and symptoms or upon suspicion of intracranial [[listeriosis]].
*[[Subcortical]] [[abscesses]] are a common finding on [[MRI]] in patients with rhomboencephalitis due to [[Listeria|''Listeria'']]. Most common sites for these [[abscesses]] include the [[thalamus]], [[pons]] and [[medulla]].<ref name="pmid18926754">{{cite journal |vauthors=Kayaaslan BU, Akinci E, Bilen S, Gözel MG, Erdem D, Cevik MA, Bodur H |title=Listerial rhombencephalitis in an immunocompetent young adult |journal=Int. J. Infect. Dis. |volume=13 |issue=2 |pages=e65–7 |year=2009 |pmid=18926754 |doi=10.1016/j.ijid.2008.06.026 |url=}}</ref><ref name="pmid8507761">{{cite journal |vauthors=Armstrong RW, Fung PC |title=Brainstem encephalitis (rhombencephalitis) due to Listeria monocytogenes: case report and review |journal=Clin. Infect. Dis. |volume=16 |issue=5 |pages=689–702 |year=1993 |pmid=8507761 |doi= |url=}}</ref>


==References==
==References==
{{Reflist|2}}
{{Reflist|2}}
[[Category:Bacterial diseases]]
 
[[Category:Disease]]
[[Category:Infectious disease]]


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Latest revision as of 22:31, 29 July 2020

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: João André Alves Silva, M.D. [2]

Overview

Brain MRI may be helpful in the diagnosis of Listeria monocytogenes brain lesions. Findings on MRI suggestive of listeriosis include lesions in the cerebellum, brainstem, and cortex.[1] High-signal lesions on T2-weighted images and enhancing lesions on T1-weighted images can be identified in the cerebral parenchyma on MRI following administration of IV contrast. With a high pre-test probability, brainstem involvement on MRI is strongly suggestive of listeriosis. Contrast MRI is recommended among all patients presenting with listerial meningitis, listerial bacteremia, suggestive CNS signs and symptoms or upon suspicion of intracranial listeriosis.

MRI

References

  1. 1.0 1.1 1.2 Armstrong RW, Fung PC (1993). "Brainstem encephalitis (rhombencephalitis) due to Listeria monocytogenes: case report and review". Clin Infect Dis. 16 (5): 689–702. PMID 8507761.
  2. Kayaaslan BU, Akinci E, Bilen S, Gözel MG, Erdem D, Cevik MA, Bodur H (2009). "Listerial rhombencephalitis in an immunocompetent young adult". Int. J. Infect. Dis. 13 (2): e65–7. doi:10.1016/j.ijid.2008.06.026. PMID 18926754.


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