In contrast, thymic lymphomas accounted for 82% and 83% of tumors found in p53−/−p73+/− and DKO mice, respectively (Fig. 1D and Table 1), whereas B cell lymphomas, sarcomas and carcinomas were less frequent in p53−/−p73+/− mice and even less so in DKO animals (Table 1). This evidence concerns the gene TP53 and B-cell non-Hodgkin lymphoma.