Seckel syndrome in a Yemeni family in Saudi Arabia.

We studied a 28-year-old Yemeni woman with typical Seckel syndrome. Two deceased sibs, a twin sister and a brother, had also been affected. The father of these individuals was married to his cousin's daughter: the pedigree suggests autosomal recessive inheritance. Classical Seckel syndrome has not been reported previously in Arabs, and this appears to be the first report from the Middle East.