Inclusion of satellites in an 18/21 translocation chromosome shown by ammonical-silver staining (sat-banding) in case of partial trisomy 18.

Abstract
A male infant with a partial trisomy 18 and a 46,XY,-21,t(18;21)(18qter.fwdarw.18q12::21p13.fwdarw.21qter) chromosome complement is described. The translocation chromosome is of special interest because it includes the satellites of chromosome 21. This was shown by differential satellite staining with the ammoniacal-silver technique.