Complete situs inversus and broad thumbs and big toes with postaxial polydactyly.

A healthy, non-consanguineous couple had a son with complete situs inversus viscerum (including dextrocardia but without other cardiac defects), broad thumbs and big toes, postaxial polydactyly, average intelligence and length proportion of the extremities, and a normal face. The common cause of these defects may have a role in the origin of sidedness and symmetry in morphogenesis.