Ectrodactyly, cleft lip and palate in two half sibs.

Two half sibs with bilateral complete cleft lip and complete cleft of the palate associated with ectrodactyly of the hands and feet, born to the same phenotypically normal mother, are reported. The younger of the two sibs also has dominantly inherited tremors (also referred to as essential heredofamilial tremors) as did her biological father. Possible genetic causes to explain the recurrence of the facial and limb malformations in the half sibs with additional central nervous system malformations in the younger sib are discussed.