Fig. 3
Brain magnetic resonance imaging findings. a Sagittal T1-weighted and axial T2-weighted images of patient 1 demonstrating gray matter thickening in the frontal gyri bilaterally with scattered areas of increased T2 signal intensity in the subcortical white matter consistent with polymicrogyria. There is no evidence of encephalocele. b Sagittal T1-weighted and axial T2-weighted images of patient 2 demonstrating gray matter thickening in the inferior and middle frontal gyri bilaterally consistent with polymicrogyria. There is no evidence of encephalocele