It is not surprising that tumor SUV might correlate with patient survival, because previous studies have reported tumor SUV had a correlation with the Ki-67 proliferation index,[17,18] a known prognostic factor in DLBCL.[19] Chihara et al[20] reported high SUV >30 was independently associated with shorter PFS. The gene discussed is MKI67; the disease is diffuse large B-cell lymphoma.