A syndrome that is characterized by megalencephaly, polymicrogyria, and hydrocephalus with variable polydactyly. It has been described in six unrelated patients. Intellectual deficit or slow development is also present. The mode of inheritance of this syndrome is unknown since all cases were sporadic.

Distance between the commissures of the mouth more than 2 SD below the mean. Alternatively, an apparently decreased width of the oral aperture (subjective).