Waldenström’s macroglobulinaemia (WM) is a chronic, indolent, B-cell lymphoproliferative disorder characterised by bone marrow infiltration with lymphoplasmacytic cells that secrete monoclonal immunoglobulin M (IgM) and activate the B-cell receptor signalling complex, of which Bruton tyrosine kinase (BTK) is a crucial enzyme [7, 8]. This evidence concerns the gene BTK and Waldenstrom macroglobulinemia.