Presentation
Absence / atonic seizures.
Patient Data
Age: 30 years
Gender: Female
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Extensive bilateral predominantly frontal and to a lesser degree parietal subcortical thin grey matter bands are seen, with T1 and T2 signal isointense to grey matter. They are separated from the overlying cortex by white matter. Sulcation is normal.
Case Discussion
This case illustrates extensive, predominantly frontal, subcortical band heterotopia in a patient with established x-linked band heterotopia syndrome - presumably DCX gene located on the long arm of chromosome X (the predominantly frontal distribution is also in favor of this). This condition represents the less severe end of the Lissencephaly type I - subcortical band heterotopia spectrum of malformations.
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