Dawsonfinger
![](https://pacs.de/sites/default/files/pictures/thumbs/data.pacs.de/9/8/5/8/4/13244_2016_507_Fig9_HTML_thumb.jpg)
The clothes
maketh the sign. Sagittal fluid attenuated inversion recovery MRI sequence depicting several adjacent high signal pericallosal lesions resembling adjacent jewels in a Venus flytrap necklace, a style popular in the 1920s. The high signal lesions correlate with demyelinating plaques which typically arise in a perivenous location, the arrangement of lesions, at right angles to the corpus callosum, represents the distribution of callososeptal medullary veins, the appearance has also been described as “Dawson fingers”
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Multiple
sclerosis • Multiple sclerosis - Dawson's fingers - Ganzer Fall bei Radiopaedia
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Multiple
sclerosis • Multiple sclerosis - Ganzer Fall bei Radiopaedia
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Dawson
fingers • Multiple sclerosis - Ganzer Fall bei Radiopaedia
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Multiple
sclerosis • Multiple sclerosis - Ganzer Fall bei Radiopaedia
![](https://pacs.de/sites/default/files/pictures/thumbs/data.pacs.de/1/1/3/9/7/8/88b488d9413beb3508ba36040774f9_big_gallery_thumb.jpg)
Dawson
fingers • Multiple sclerosis - Ganzer Fall bei Radiopaedia
![](https://pacs.de/sites/default/files/pictures/thumbs/data.pacs.de/1/0/3/2/6/3/e99100edb8c40dfe0aecaf45bb852c_big_gallery_thumb.jpg)
Multiple
sclerosis • Multiple sclerosis - Ganzer Fall bei Radiopaedia
![](https://pacs.de/sites/default/files/pictures/thumbs/data.pacs.de/1/1/3/9/7/9/038dbb19ebd26faad07b8d6f3183e9_big_gallery_thumb.jpg)
Dawson
fingers • Multiple sclerosis with active lesions - Ganzer Fall bei Radiopaedia
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Dawson
fingers • Multiple sclerosis - Dawson fingers - Ganzer Fall bei Radiopaedia
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Dawson
fingers • Wallerian degeneration in multiple sclerosis - Ganzer Fall bei Radiopaedia
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Dawson
fingers • Multiple sclerosis - Ganzer Fall bei Radiopaedia
Dawson fingers are a radiographic feature of demyelination characterized by periventricular demyelinating plaques distributed along the axis of medullary veins, perpendicular to the body of the lateral ventricles and/or callosal junction. This is thought to reflect perivenular inflammation. They are a relatively specific sign for multiple sclerosis.
Radiographic features
MRI
- T1: low signal in chronic lesions; otherwise usually isointense to white matter
- T2/FLAIR: linear or ovoid high signal
- T1C+ (Gd): enhancement can be seen with active lesions
History and etymology
Dawson fingers are named after Scottish pathologist James Walker Dawson (1870-1927 ) who described the phenomenon on histopathological specimens in an article in 1916 , although the term "Dawson fingers" was brought forward by Charles Lumsden.
Siehe auch:
- Encephalomyelitis disseminata
- Subakute sklerosierende Panenzephalitis
- Dawson Kriterien
- McDonald Diagnostic Criteria for MS
und weiter:
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