MRI, FLAIR images, axial slices. (A) White matter lesion, type 1: focal lesion. Focal hypersignal on right frontal lobe. (B) White matter lesion, type 2: beginning confluence lesion. Multiple focal hypersignal on right and left hemispheres. (C) Another white matter lesion, type 2: beginning confluence lesion. Multiple hypersignal on right and left hemispheres with small confluence.