Five familial cases with a trisomy 16p syndrome due to translocation

Abstract
A clinical description is given of a syndrome present in three postnatally and two prenatal‐ly detected cases with partial trisomy 16p, caused by a familial translocation t(16;21) (pll;q22). The most consistent features of this syndrome are: low birth weight, small head circumference, low‐set ears, palato(gnatho)schisis, micrognathia, thumb‐agenesis or hypoplasia, hypertonia, overlapping fingers, single umbilical artery, and psychomotor retardation. The clinical picture was identical to that described by Roberts & Duckett (1978) for a single case.