SNP array copy number ideograms of chromosome 1 (USN1902) and chromosome 5 (USN9124). (A) Comparison of chromosomal abnormalities present in BM and PB. Copy number variations present in the BM are clearly visible in PB; however, they are slightly reduced (BM gain CN-2.3, loss CN-1.7; PB gain CN-2.1, loss CN-1.85). (B) Representative ideogram of chromosome 5 from a patient with 5q syndrome showing del(5q). (C) FISH analysis showing 2 cells with del5q and 1 with a normal chromosome 5 from the PB of a 5q-syndrome patient. The red and the green probes are the 5q31 EGR1 and the 5p15 D15523/D55721 probes, respectively.