De novo interstitial direct duplication of 15q: 46,XY,dir dup(15) (pter leads to q24::q14 leads to q21 X 1::q24 leads to qter).
A profoundly retarded, slightly dysmorphic male was re-examined cytogenetically by high resolution GTG banding and found to have a de novo interstitial direct duplication of 15q.
D000015:Abnormalities, Multiple / Q000235:genetics; D002648:Child; D002869:Chromosome Aberrations; D002901:Chromosomes, Human, 13-15; D006801:Humans; D008297:Male