Yunis-Varon syndrome with severe osteodysplasty.

We report two male sibs and two female sibs from separate families, both with normal parents, who had a lethal condition with features of the Yunis-Varon syndrome and radiological signs of severe osteodysplasty. Autosomal recessive inheritance is likely in both families. The additional features described represent further delineation of the phenotype of the Yunis-Varon syndrome.