PIK3CG and diffuse large B-cell lymphoma: Alizadeh et al. found that PIK3CG was highly expressed in GCB (germinal center B-cell like), and patients with GCB DLBCL had a significantly better OS than those with ABC (activated B-cell like) DLBCL [21], which was consistent with our detection that PIK3CG expression was significantly higher in GCB cell lines (n = 4).