Both germline and somatic LNK mutations have been identified in a range of haematological diseases, including myeloproliferative neoplasms (MPN), myelodysplastic syndromes (MDS), MDS/MPN overlap syndromes and acute lymphoblastic leukaemia (both B and T lineage) [41,42,43,44,45,46,47]. The gene discussed is SH2B3; the disease is myeloproliferative neoplasm.