Periventricular nodular heterotopia


Periventricular nodular heterotopia is a common cortical malformation in adults. Subependymal nodules of gray matter line the lateral walls of the ventricles and follows gray matter density on CT and signal intensity on MRI. These nodules do not enhance on post contrast examination. When periventricular nodular heterotopia is recognized in female patients of reproductive age, genetic counseling is adviced as FLNA x-linked dominant mutation is fatal to affected male resulting in  perinatal/in utero demise.