Translocation t(5;6) ascertained through a child who showed a phenotype suggesting the crie-du-chat syndrome. The picture shows that his father was a carrier of an almost cryptic translocation t(5;6)(5p15.1;6q34). The child inherited the der(5) but not the der(6), so he is monosomic for the 5p15.1->5pter region and trisomic for the segment 6q34->6qter).

This case has been studied in collaboration with Dr. G.Scarano (Avellino)