IHC staining revealed that the staining intensity and the staining proportion of PKM1 were markedly low (H-score: 0) and that the PKM2 staining intensity was moderate and the staining proportion of PKM2 was about 70% (H-score: 140) in the DLBCL FFPE sample (Fig. S4). Here, PKM is linked to diffuse large B-cell lymphoma.