ELAVL3 and cerebral cortical dysplasia: A de novo missense variant (NM_001420: c.889G > A;p.Glu297Lys) in ELAVL3 was identified in patient NJ463 with severe cortical dysplasia, thin corpus callosum, dilated lateral ventricles, simplified gyral pattern and overlapping cranial sutures (Table 2 and Supplementary Fig. S2).