Mental retardation with 45 chromosomes 45,XX,--5,--14,+der(5) t(5,14)(p15;q13) mat due to familial balanced reciprocal translocation.

Abstract
A girl with severe mental retardation and odd facies and some features of the cri-du-chat syndrome had only 45 chromosomes. Her karyotype was 45,XX,-5,-14,+der(5)t(5,14)(p15;q13)mat. Her mother and her 2 sisters were balanced reciprocal translocation carriers having 46 chromosomes, one of which was a very small (14pter.fwdarw.14q13::5p15.fwdarw.5pter) that was missing in the proposita.