Cluster analysis of 45 t(14;18)⁻FL cases. Only patients with complete mutational analyses were included. Independent clinical and morphological variables for cluster analysis are depicted. The cluster analysis includes NGS results and frequent CNA affecting frequently mutated gene loci. Each column represents one patient and each line one specific analysis. On the right side of the figure, the frequency of the particular result of the analysis is shown. Four identified molecular groups are labeled as A1, A2, B1, and B2.