Signaling pathway mutations of diagnostic relevance in small B-cell lymphoproliferative disorders. The rows in the heat map represent genes. The columns in the heat map represent diseases: SMZL, NMZL, LPL/WM; hairy cell leukemia (HCL), variant hairy cell leukemia (vHCL), splenic diffuse red pulp lymphoma (SDRPL), CLL, and MCL. The heat map is color coded according to the prevalence of gene mutations in each disease entity. Numbers in the cells indicate the prevalence of mutations.