Table 3.
MR characteristics of PRES patients with atypical regions.
| Location | MR feature | ||
|---|---|---|---|
| Cerebellum | 331/556 (59.5%) | T1WI(–)&T2WI(+) | 556/556 (100.0%) |
| Occipital lobe | 278/556 (50.0%) | DWI(=)&ADC(+) | 47/148 (31.8%) |
| Parietal lobe | 234/556 (42.1%) | DWI(+)&ADC(+) | 43/148 (29.1%) |
| Frontal lobe | 150/556 (27.0%) | DWI(+)&ADC(–) | 31/148 (20.9%) |
| Basal ganglia | 135/556 (24.3%) | DWI(=)&ADC(=) | 20/148 (13.5%) |
| Periventricular/deep white matter | 125/556 (22.5%) | DWI(+)&ADC(=) | 5/148 (3.4%) |
| Temporal lobe | 124/556 (22.3%) | DWI(–)&ADC(–) | 3/148 (2.0%) |
| Pons | 124/556 (22.3%) | DWI(–)&ADC(+) | 2/148 (1.4%) |
| Brainstem | 115/556 (20.7%) | DWI(–)&ADC(=) | 1/148 (0.7%) |
| Thalamus | 114/556 (20.5%) | Enhancement | 29/93 (31.2%) |
| Midbrain | 48/556 (8.6%) | Hemorrhage | 33/556 (5.9%) |
| Spinal cord | 33/556 (5.9%) | Microbleeds | 19/24 (79.2%) |
| Medulla | 29/556 (5.2%) | Hydrocephalus | 35/556 (6.3%) |
ADC, apparent diffusion coefficient; DWI, diffusion-weighted imaging; T1WI, T1-weighted imaging; T2WI, T2-weighted imaging; –, hypointensity; =, iso-intensity; +, hyperintensity.