disease has major feature partial corpus callosum agenesis-cerebellar vermis hypoplasia with posterior fossa cysts syndrome https://www.malacards.org/card/partial_corpus_callosum_agenesis_cerebellar_vermis_hypoplasia_with_posterior_fossa_cysts_syndrome MONDO:0018430 UMLS:C4750913 MEDGEN:1660429 GARD:0021707 Orphanet:401959 A rare, hereditary, cerebral malformation with epilepsy syndrome characterized by severe global developmental delay with no ability to walk and no verbal language, intractable epilepsy, partial agenesis of the corpus callosum and cerebellar vermis hypoplasia with posterior fossa cysts. central nervous system malformation