{Reference Type}: Review {Title}: Syndrome of megalencephaly, mega corpus callosum, and complete lack of motor development: an unusual case and a literature review. {Author}: Cetin EB;Bilgici MNC;Tuncer GO;Karabag IS;Aydin S; {Journal}: Childs Nerv Syst {Volume}: 40 {Issue}: 1 {Year}: 2024 Jan 9 {Factor}: 1.532 {DOI}: 10.1007/s00381-023-06150-5 {Abstract}: The syndrome of megalencephaly, mega corpus callosum (MEG-MegaCC) accompanied by complete lack of motor development is a rare condition with only few sporadic cases having been reported in the literature. In this paper, we describe a child from non-consanguineous parents presenting with MegaCC, psychomotor retardation, and language impairment linked to MEG-MegaCC syndrome. Genetic analysis, radiological findings, and detailed neurological phenotype of MEG-MegaCC syndrome with its overlapping syndromes would allow for a better classification of the disease spectrum.