CD34 and myelodysplastic syndrome with single lineage dysplasia: Boultwood et al. [21] compared the transcriptome of the CD34+ cells in a group of 10 patients with the 5q-syndrome using the Affymetrix Gene Chip U133 Plus 2.0 array platform with the transcriptome of CD34+ cells from 16 healthy control subjects and 14 patients with refractory anemia and a normal karyotype.