Dawson fingers

Dr Ian Bickle and Eytan Raz et al.

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 3) who described the phenomenon on histopathological specimens in an article in 1916 2, although the term "Dawson fingers" was brought forward by Charles Lumsden.

White matter disorders
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Article information

rID: 1202
Section: Signs
Synonyms or Alternate Spellings:
  • Dawson's fingers

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Cases and figures

  • Case 1
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  • Case 2
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  • Case 3
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  • Case 4
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  • Case 5
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  • Case 6
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  • Case 7: DWI
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  • Case 8
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  • Case 9
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