Partial agenesis of the corpus callosum (HP_0001338) is a partial failure of the development of the corpus callosum. Also known as: Corpus callosum agenesis, partial, Partial agenesis of corpus callosum, Partial corpus callosum agenesis, Partial or complete agenesis of corpus callosum, Partial to complete agenesis of corpus callosum, Partial-total agenesis of corpus callosum.