Patterns of the mutations observed in MDS patients reported to the data set of the International Working Group for MDS. (A) Distribution of somatic lesions in the analyzed genes according to the WHO category. Each column represents an individual patient sample. (B) Distribution of somatic lesions in the analyzed genes in patients with MDS-RS with or without SF3B1 mutation. CMML, chronic myelomonocytic leukemia; RA, refractory anemia; RAEB, refractory anemia with excess blasts; RCUD, refractory cytopenia with unilineage dysplasia; unk, unknown.