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Ring Lesions - Open Ring Sign

Smirniotopoulos, M.D. JGSM - MedPix (2004)

View Article: MedPix Image - MedPix Topic

Affiliation: Uniformed Services University

ABSTRACT

There are many causes of "ring lesions" on MR, CT, and angiography: Magic Doctor: M ‑ Metastasis, MS A ‑ Abscess (Also Cerebritis G ‑ Glioblastoma, Granuloma I ‑ Infarct (Esp. Basal Ganglia) C ‑ Contusion (Rare) A ‑ AIDS (Toxo, Etc.) L ‑ Lymphoma (in Aids) D ‑ Demyelination (Active) R ‑ Resolving Hematoma,Radiation Change (Necrosis) However, most of these lesions form a complete ring surrounding a non-enhancing center; and, they usually have a corona of surrounding vasogenic edema. ==================================== The "incomplete ring sign" has been reported with the inflammatory enhancement of acute demyelination [Ref 1,2] http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?dopt=abstract&cmd=search&dispmax=50&sort=pub+date&db=pubmed&term=Ring%20Lesions%20-%20Open%20Ring%20Sign ====================================

No MeSH data available.


Notice that there is no vasogenic edema surrounding the lesion - the signal abnormality ends at the edge of the enhancement.  This is highly typical for inflammatory demyelination (e.g. MS and tumefactive demyelination); and, this is very atypical for abscess and neoplasm.
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MPX2801_synpic19707: Notice that there is no vasogenic edema surrounding the lesion - the signal abnormality ends at the edge of the enhancement. This is highly typical for inflammatory demyelination (e.g. MS and tumefactive demyelination); and, this is very atypical for abscess and neoplasm.


Ring Lesions - Open Ring Sign

Smirniotopoulos, M.D. JGSM - MedPix (2004)

Notice that there is no vasogenic edema surrounding the lesion - the signal abnormality ends at the edge of the enhancement.  This is highly typical for inflammatory demyelination (e.g. MS and tumefactive demyelination); and, this is very atypical for abscess and neoplasm.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=MPX2801&req=5

MPX2801_synpic19707: Notice that there is no vasogenic edema surrounding the lesion - the signal abnormality ends at the edge of the enhancement. This is highly typical for inflammatory demyelination (e.g. MS and tumefactive demyelination); and, this is very atypical for abscess and neoplasm.

View Article: MedPix Image - MedPix Topic

Affiliation: Uniformed Services University

ABSTRACT

There are many causes of "ring lesions" on MR, CT, and angiography: Magic Doctor: M ‑ Metastasis, MS A ‑ Abscess (Also Cerebritis G ‑ Glioblastoma, Granuloma I ‑ Infarct (Esp. Basal Ganglia) C ‑ Contusion (Rare) A ‑ AIDS (Toxo, Etc.) L ‑ Lymphoma (in Aids) D ‑ Demyelination (Active) R ‑ Resolving Hematoma,Radiation Change (Necrosis) However, most of these lesions form a complete ring surrounding a non-enhancing center; and, they usually have a corona of surrounding vasogenic edema. ==================================== The "incomplete ring sign" has been reported with the inflammatory enhancement of acute demyelination [Ref 1,2] http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?dopt=abstract&cmd=search&dispmax=50&sort=pub+date&db=pubmed&term=Ring%20Lesions%20-%20Open%20Ring%20Sign ====================================

No MeSH data available.