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]. This evidence concerns the gene SF3B1 and thrombocytosis disease.