Keywords:
MR, Neuroradiology brain, Management
Authors:
E. Siebert, T. Liman, G. Bohner; Berlin/DE
DOI:
10.1594/ecr2011/C-0067
Results
•94 cases of definite PRES
Edema grading (Fig.
1)
•Grade 1: 16%
•Grade 2: 40%
•Grade 3: 27%
•Grade 4: 10%
•Grade 5: 4%
Localisation (Fig.
2-6)
•Lobar: occipital 81%,
parietal 76%,
frontal 51%,
temporal 44%
•Striatum 21%,
Thalamus 18%,
Hypothalamus 3%
•Midbrain 11%
•Pons 15%
•Cerebellum 24%
•Medulla oblongata 3%
•Corpus callosum 8%
Distribution pattern (Fig.
7-9)
•parieto-occipital (PO) pattern 51%
•superior frontal sulcus (SFS) pattern 17%
•holohemispheric watershed pattern 16%
•central pattern 6% •asymmetric expression 6%
•combination of patterns 25%:
–most frequently: SFS + PO pattern 14%
Hemorrhage (Fig.
10-12)
12% microbleeds
4% SAB
8% parenchymal
6% focal cortical
Diffusivity (Fig.
13 - 16)
•67% ADC increase = vasogenic edema
•16% ADC reduction = cytotoxic edema
•2% ADC (pseudo)normal
Blood – brain barrier disruption (Fig.
17-19)
•80% no Gd - enhancement
•20% Gd - enhancement
–10 % leptomeningeal
–10% parenchymal
Vasculopathy (Fig.
20)
•In 20% of cases signs of vasculopathy were observed