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.