TP53 and T-cell non-Hodgkin lymphoma: This was shown by the observation that Δ122p53/mΔpro mice survived much longer than mΔpro/- and Δ122p53/- mice and were largely protected from the aggressive early onset T-cell lymphomas typical of p53−/− mice, and the least differentiated DLCL and DLCL-like tumors common in Δ122p53/- mice.