TP53 and T-cell non-Hodgkin lymphoma: In sharp contrast, out of eight late-stage Rag2−/−OTII p53−/− T cell lymphomas, six lacked clonal 9qA4-5.3 amplification (range = 0% to 7.3%, n = 338 metaphases analyzed) (Figures 3D and 3E; Table S5).