Frequency of TET2 mutations in studied patients. (A) Frequency of TET2 mutations among various clinical subtypes of myeloid disorders. The frequencies of TET2 mutations are calculated for each disease category including CMML-1/2 (n = 17), MDS/MPN-sAML (n = 14), MDS/MPN (n = 30), and MDS (n = 14). (B) Distribution of various disease subtypes among patients with TET2 mutation (n = 19 or 100% TET2 mutations).