Article Figures & Data
Figures
- Fig 1.
FLAIR imaging (A) showing edema around the CET component (B) sparing the cortex (arrowhead), producing the characteristic fingerlike appearance.
- Fig 2.
FLAIR imaging (A) showing edema extending around the left lentiform nucleus. The CET component is shown in B.
- Fig 3.
FLAIR imaging (A) demonstrating nCET involving the anterior right temporal cortex (asterisk), insula, and thalamus (arrowhead). A narrow window width has been used to improve conspicuity. The small CET component lies further superiorly (B, arrow).
- Fig 4.
FLAIR imaging (A) showing eccentric extension of nCET across the corpus callosum, with associated expansion (arrowhead). Rounded hyperintensity in the left thalamus (arrow) is also consistent with nCET. Note the paucity of edema in the white matter immediately adjacent to the CET component (B).
Tables
Conventional and advanced MRI features useful for differentiating between nCET and edema
nCET Edema Conventional MRI features Gray matter involvement Spares the gray matter Eccentric Relatively concentric around enhancing lesions Relatively mild FLAIR and T2 hyperintensity More marked FLAIR and T2 hyperintensity Focal parenchymal expansion More diffuse mass effect if marked edema Advanced MRI sequences Relative diffusion restriction Facilitated diffusion Choline elevation, NAA depletion Normal MRS findings Elevated rCBV around CET rCBV elevation confined to CET Note:—rCBV indicates relative cerebral blood volume.
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