Location of hyperintense lesions on T2/FLAIR No. of patients (%) No. of lesions per patient (mean (range))
Bilateral
Unilateral
18 (85.7)
3 (14.3)
 
No of lesions  (range, mean) 4-48 (11.2)  
Size of lesions (range, mean) 2-20 mm (9.3)  
Frontal lobe
Parietal lobe
Temporal lobe
Occipital lobe
10 (47.6)
5 (23.8)
4 (19.1)
2 (9.5)
0–23 (7)
0–19 (2.9)
0-5 (1.4)
0-5 (1.1)
Site

Cortical grey matter
Subcortical white matter
Periventricular white matter
Deep gray matter
Brain stem
Cerebellum
Corpus callosum (Splenium)
  16 (76.1)
19 (90.5)
13 (61.9)
10 (47.6)
8 (38.1)
0 (0)
0 (0%)
  0-28 (5.1)
0-42 (6.3)
0-15 (2.4)
0-2 (0–2)
0–2 (0.3)
0-6 (1.2)
0
Table 3: Initial T1, T2/FLAIR MRI Findings in 21 Patients with ADEM.