In addition, as myeloid/lymphoid neoplasms with eosinophilia and tyrosine kinase gene fusions (MLN-TK) are characterized by genetic abnormalities such as PDGFRA, PDGFRB, FGFR1, JAK2, FLT3 rearrangements, or tyrosine kinase fusions (e.g., ETV6::ABL1, ETV6::FGFR2, ETV6::LYN, ETV6::NTRK3, RANBP2::ALK, BCR::RET, FGFR1OP::RET) [3], their differential diagnosis is largely based on molecular features. The gene discussed is RET; the disease is lymphoid neoplasm.