MDS flow-scores in healthy controls and patients with MDS classified by morphology. The MDS flow-score represents the presence of dysplastic features in myeloid blasts, granulocytes, and monocytes as detected by flow cytometry. Flow-scores were calculated according to the scoring system as proposed by Wells et al¹²  (Tables 2, 4); individual scores for the patients with MDS are depicted in Table 3. Spearman r = .813; P < .001. The few patients that were classified as MDS-U, MDS/MPD, or hypoplastic MDS are not included in this graph. Horizontal bars are medians.*P < .05; **P < .001.