Regarding myelodysplastic/myeloproliferative neoplasms, MDS/MPN with ring sideroblasts and thrombocytosis (formerly refractory anemia with ring sideroblasts associated with marked thrombocytosis [RARS-T]) was frequently associated with SF3B1 mutations [65,66,67]. The gene discussed is SF3B1; the disease is myelodysplastic syndrome.