Radial ray deficiency and ulnar ray deficiency in two sibs.

A kindred with a diabetic mother is described with one sibling with a radial deficiency (type 1 radial dysplasia (Bayne) with a hypoplastic thumb type 3 of Blauth) and one with an ulnar ray deficiency (type 2 of Ogden or type 1 of Swanson). A metabolic cause is probable, although the diabetes was well controlled during pregnancy.