title: A de novo tandem duplication 15(q21 leads to qter) mosaic.
mesh_terms: D000015:Abnormalities, Multiple / Q000235:genetics*; D002675:Child, Preschool; D002869:Chromosome Aberrations / Q000235:genetics*; D025063:Chromosome Disorders; D002901:Chromosomes, Human, 13-15; D006801:Humans; D008607:Intellectual Disability / Q000235:genetics; D008297:Male; D009030:Mosaicism; D014314:Trisomy