Heterogeneity in Multiple Sclerosis: Scratching the Surface of a Complex Disease

Table 5

Types of cortical lesions described by B∅ et al. 2003 [83].

Typeof cortical lesion	Extension
Type I	Extension through both white and gray matter
Type II	Lesion delimited within the cortex. Neither the brain surface nor the subcortical white matter is involved
Type III	Extended subpial lesions
Type IV	Extension throughout the full width of cerebral cortex but white matter is not involved