The sections show cerebral cortex and white matter. Mild gliosis of the sub-pial molecular layer is noted as well as accumulation of corpora amylacea. There is disturbance of laminar architecture in both specimens which is more extensive in specimen 1. Marked neuronal dystrophy and neuronomegaly is also seen in specimen 1 and there are numerous balloon cells some of which are bi-nucleate. These changes are not seen in specimen 2. Moderate numbers of neurones are noted in white matter in both specimens. Myelination is normal and there is no evidence of tumour. The features are of focal cortical dysplasia - Taylor Type IIB. The surgical margins are clear of dysplastic cortex.
DIAGNOSIS: 1&2: Frontal cortex: Focal cortical dysplasia - Taylor Type IIB.