[Partial monosomy and trisomy 5 p due to balanced translocation t (3,5) in the father (author's transl)]

A family with three retarded children is described. The phenotypical features of the eldest girl are uncharacteristic, whereas both other girls show the typical symptoms of the Cri-du-chat syndrome. Cytogenetic examination showed a balanced translocation t (3,5) in the father and partial trisomy 5 p and monosomy 5 p in the two surviving daughters.