FAB (1982)	WHO (1997)
Myelodysplastic Syndromes	Myelodysplastic Syndromes
Refractory anemia	Refractory anemia
	Refractory cytopenia with multilineage dysplasia
Refractory anemia with ringed sideroblasts	Refractory anemia with ringed sideroblasts
Refractory anemia with excess blasts	Refractory anemia with excess blasts
	Myelodysplastic syndrome, unclassifiable
	Myelodysplastic syndrome associated with del(5q)
	Reclassified from MDS to:
Refractory anemia with excess blasts in transformation	Acute Myeloid Leukemia identified as, AML with multilineage dysplasia following a myelodysplastic syndrome
Chronic myelomonocytic leukemia	Myelodysplastic and Myeloproliferative Diseases