The essential fusion of FLT3 (Fms Related Receptor Tyrosine Kinase 3) and MYO18A (Myosin 18 alpha) was detected in eosinophilic granulocytes associated with chronic myeloproliferative disorders, such as atypical chronic myeloid leukemia (Zhang et al., 2018). The gene discussed is FLT3; the disease is myeloproliferative neoplasm.