BCL6 and lymphoma: Subtype C1 shared alterations in certain pathways (e.g., NOTCH2) with low grade marginal zones lymphomas, and alterations in other NOTCH2 and BCL6 pathways were defining characteristics of this group (Li and Durbin, 2009; Chapuy et al., 2013; Scott et al., 2014; Chapuy et al., 2016; Staiger et al., 2017; Chapuy et al., 2018; Papageorgiou et al., 2021).