Lissencephaly with cerebellar hypoplasia type A (LCHa) is a form of lissencephaly with cerebellar hypoplasia that encompasses classical lissencephaly with thickened cortical gray matter with either no discernible gradient, a gradient with posterior predominance, or a gradient with anterior predominance, and cerebellar vermis hypoplasia. The disease is lissencephaly with cerebellar hypoplasia type A (MONDO_0015034, a Monarch Disease Ontology entry).