WHO classification-based Prognostic Scoring System for Myelodysplastic SyndromeLoading...WHO CategoryRefractory anemia (RA), refractory anemia with ringed sideroblasts (RARS), or myelodysplastic syndrome with isolated del (5q)0Refractory cytopenia with multilineage dysplasia (RCMD), or refractory cytopenia with multilineage dysplasia and ringed sideroblasts (RCMD-RS)+1Refractory anemia with excess of blasts, 2-4% blasts in peripheral blood (RAEB-1)+2Refractory anemia with excess of blasts, 5-19% blasts in peripheral blood (RAEB-2)+3KaryotypeGood = normal, –Y, del(5q)0Intermediate = all other abnormalities+1Poor = complex (3 or more abnormalities), chromosome 7 anomalies+2Transfusion RequirementNone0Regular+1