Unilateral periventricular nodular heterotopia


The patient has history of complex partial seizures from past 15 years. EEG has shown abnormal discharges in the left fronto-temporal region.  

MRI brain shows focal unilateral grey matter heterotopia in left frontal region. No other associated anomaly was seen. 

Seizures are seen in 80-90% cases of grey matter heterotopia.