Malformations of Cortical Development, Group II. Cortical Malformations, Group II . Malformations Due to Abnormal Neuronal Migration . Malformations Secondary to Abnormal Neuronal Migration . Disorder, Neuronal Migration . Disorders, Neuronal Migration . Migration Disorder, Neuronal . Migration Disorders, Neuronal . Neuronal Migration Disorder . Neuronal Migration Disorders . Cortical malformations secondary to abnormal neuronal CELL MIGRATION in NEUROGENESIS. This group includes COBBLESTONE LISSENCEPHALY and PERIVENTRICULAR NODULAR HETEROTOPIA. . 0.67