A subtype of a family of genetic disorders known as acrocephalopolysyndactyly (ACPS) disorders. It is a very rare disease; approximately 40 cases have been described in the literature. It is determined by acrocephaly, peculiar facies, brachydactyly and syndactyly in the hands, and preaxial polydactyly and syndactyly of the toes. Marked intrafamilial variability is possible. Inherited as an autosomal recessive trait.