MRI in two patients with symptomatic frontal lobe epilepsy.
Left: Coronal FLAIR MRI showing focal cortical dysplasia in the supplementary motor area of the left frontal lobe. Note the tail extending down towards the frontal horn of the lateral ventricle. This patient was 60 years old and had had left SMA seizures for 7 years. All previous MRI studies were negative.
Right: Axial T2-weighted MRI showing an heterogeneous lesion in the left precentral area. The signal changes are consistent with haemosiderosis suggestive of a cavernous angioma.

http://www.ncbi.nlm.nih.gov/bookshelf/br.fcgi?book=epi&part=ch12&rendertype=figure&id=ch12.f8