A schematic approach to the differential diagnosis of bone marrow ring sideroblasts.
Key- BM- bone marrow, RS- ring sideroblasts, MDS-RS-SLD- myelodysplastic syndrome with ring sideroblasts and single lineage dysplasia (previously called RARS), MDS-RS-MLD- myelodysplastic syndromes with ring sideroblasts and multilineage dysplasia (previously called RCMD-RS), MDS-EB-myelodysplastic syndrome with excess blasts (previously called RAEB), PMF- primary myelofibrosis, CMML- chronic myelomonocytic leukemia, PB- peripheral blood, XLSA- X linked sideroblastic anemia, XLSA/A- XLSA with ataxia, SA- sideroblastic anemia.