Familial D/D translocation t(13q;14q). Eight members in four generations.

Eight family members spanning four generations were found to have 45 chromosome count D/D trnaslocation identified by Giemsa-trypsin banding as t(13q;14q). The only mature male is believed to be infertile on the basis of a very low sperm count with reduced motility. This is believed to be related to the chromosome aberration and not to be coincidental. Aside from this, all were clinically normal except the index case, a young girl with unusual facies and moderate to severe retardation of growth and development. It is believed that her abnormalities were coincidental to the chromosome translocation and fortuitous in locating this family and initiating the pedigree. This example of essentially benign (some males are fertile) Robertsonian centric fusion in humans lends itself to interesting speculations about the results from chance matings between such translocation carriers.