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Table 1 New classification system of focal cortical dysplasia by Blumcke et al. 2011

From: Diagnostic contribution of focal cortical dysplasia MRI imaging findings and ADC values

Type

Characteristic features

I

• a—Focal cortical dysplasia with abnormal radial cortical lamination

• b—Focal cortical dysplasia with abnormal tangential 6-layer cortical lamination

• c—Focal cortical dysplasia with abnormal radial and tangential cortical lamination

II

• a—Focal cortical dysplasia with dysmorphic neurons

• b—Focal cortical dysplasia with dysmorphic neurons and balloon cells

III

• a—Architectural distortion of cortical layer in temporal lobe with hippocampal atrophy

• b—Architectural distortıon of cortical layer adjacent to glial or glioneuronal tumor

• c—Architectural distortıon of cortical layer adjacent to vascular malformation

• d—Architectural distortıon of cortical layer adjacent to other lesions acquired ın early childhood such as trauma, ischemıc event, encephalitis