Histopathology neoplastic lesions.

Mentioned n-numbers are tumor bearing animals available for microscopical examination.k-/-;d-/-: ku80-/-; dna-pkcs−/−.mes. lm. nd.: mesenterial lymph node.ax. lm. nd.: axillary lymph node.*∼5 thymus tumor preparations were microscopically examined per group and found to be all lymphomas. All other macroscopic neoplastic lesions observed in thymus are assumed to be lymphomas as well.** analyzed in femur.Tumor incidence based on all animals from longevity cohort, including those not microscopically examined.