New dominant syndrome of microcephaly, facial abnormalities, micromelia, and mental retardation.

We report on three brothers, aged 6, 3, and 2 years, with a hitherto undescribed combination of microcephaly, facial abnormalities, micromelia, and mild mental retardation. Their facial abnormalities included a forehead with bitemporal constriction, upslanting palpebral fissures, synophrys, a short nose with anteverted nostrils, a short columella, a cupid bow-shaped, thin vermilion border of the upper lip, and micrognathia. Their mother had similar clinical manifestations, but was of normal intelligence. The disease was apparently transmitted in a dominant fashion.