<prompt> Aneuploidy is seen with all except:Trisomy of chromosome 18 and 13Trisomy 21Klinefelter syndromeDiGeorge syndrome  <response>: Aneuploidy is the number of chromosomes which is not an exact multiple of haploid number e.g. hypodiploid or 2N-1 45 chromosomes monosomy, hyperdiploid or 2N1 47 chromosomes trisomy.Common syndromes with numerical aberrations:Downs syndrome: Trisomy 21 Klinefelters syndrome: Sex chromosome trisomy - 47, XXYTurners syndrome: Monosomy 45, X0DiGeorge syndrome, also known as 22q11.2 deletion syndrome, is a syndrome caused by the deletion of a small segment of chromosome 22. Mohan H. Textbook of pathology. Jaypee Brothers Medical Publishers; 2015. Edition 7. Page 253 