All the patients n = 23

With sequelae n = 11

Whitout sequelae n = 12

Difference between the 2 groups: Statistical significance

Bilateral lesions

21 (91)

9 (82)

12 (100)

NS

Asymmetrical lesions

12 (52)

9 (82)

3 (25)

p = 0.006

Mean number of lesions

8,4

8,2

8,5

NS

Cortical lesion

10 (43)

6 (55)

4 (33)

NS

Lesions of the sub-cortical white matter

13 (57)

6 (55)

7 (58)

NS

Lesions of the deep and periventricular white matter

7 (30)

3 (27)

4 (33)

NS

Localisation of the lesions

Frontal

11 (48)

7 (64)

4 (33)

NS

Temporal

9 (39)

7 (64)

2 (17)

p = 0.021

Parietal

9 (39)

8 (73)

1 (8)

p = 0.002

Occipital

6 (26)

5 (45)

1 (8)

p = 0.043

Insula

6 (26)

3 (27)

3 (25)

NS

Thalamus

11 (48)

3 (27)

8 (67)

NS

Basal ganglia

13 (57)

5 (45)

8 (67)

NS

Caudate nucleus

9 (39)

3 (27)

6 (50)

NS

Putamen and globus pallidus

13 (57)

5 (45)

8 (67)

NS

Brainstem

6 (26)

3 (27)

3 (25)

NS

Midbrain

3 (13)

2 (18)

1 (8)

NS

Pons

4 (17)

2 (18)

2 (17)

NS

Medulla oblongata

5 (22)

2 (18)

3 (25)

NS

Cerebral peduncles

10 (43)

3 (27)

7 (58)

NS

Corpus callosum

3 (13)

0

3 (25)

NS

Internal capsule

3 (13)

2 (18)

1 (8)

NS

Cerebellum

5 (22)

2 (18)

3 (25)

NS

Cerebellar peduncles

4 (17)

1 (9)

3 (25)

NS

Spinal cord

2 (9)

1 (9)

1 (8)

NS

Optic nerves

0 (0)

0 (0)

0 (0)

Enhancement after gadolinium injection^*

4/21 (19)

2/10 (20)

2/11 (18)

NS

Restricted diffusion

4 (17)

2 (18)

2 (17)

NS

T1 hyposignal

8 (35)

3 (27)

5 (42)

NS