Dawson's fingers

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Dawson's Fingers appearing on an MRI scan

"Dawson's Fingers" is a condition affecting the brain of Multiple Sclerosis victims. The condition is the result of a build-up of pressure in the veins within the chest cavity, which causes blood in these veins to flow backwards through one of the jugular veins, and into the brain. This backflow of blood results in the engorgement of veins within the brain, causing damage to the surrounding tissues. This results in a finger-like appearance of the lesions extending mainly off the ventricles within the brain. The term is named for histologist James Walker Dawson, who first defined the condition [1].^{[this source's reliability may need verification]}