Polymicrogyria and absent septum pellucidum

Discussion:

MRI is now almost routinely performed in those with epilepsy to review for an underlying structural abnormality responsible for seizures.

One of the key elements to be reviewed is the presence of a wide range of cortical dysplasias and migrational disorders.  In this case polymicrogyria is found in the most commonly affected area, the perisylvian region, and is associated with an absent septum pellucidum, which is a recognized association. 

This is an exceptionally late presentation on MRI, which is likely related to local circumstances and limited access to MRI.

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