DESH (disproportionately enlarged subarachnoid space hydrocephalus)

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Synonyms
disproportionately enlarged subarachnoid space hydrocephalus, DESH sign

The DESH (Disproportionately Enlarged Subarachnoid Space Hydrocephalus) sign is an imaging finding indicative of normal pressure hydrocephalus. It is characterized by enlargement of the cerebrospinal fluid spaces in the region of the Sylvian fissure and the basal cisterns. In contrast, the cerebrospinal fluid spaces over the convexity become progressively narrower1.

Imaging

DESH MRI
DESH sign on a T2-weighted MRI sequence. Figure adapted from Greenberg's Handbook of Neurosurgery.

References

    1. Imaging in iNPH. In: Greenberg M, ed. Handbook of Neurosurgery. 9th Edition. Thieme; 2019. ↩ ↩

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