significant differences were found in tumor incidence ( 30 % , ec ' 42 % , hc ) , occurrence of malignant neoplasms ( 15 % , ec ; 32 % , hc ) , appearance of multiple primary tumors in different organs ( 42 % , ec ; 30 % , hc ) , average survival rates of tumor-bearing animals , organ distribution and histologic types , and average survival rates of all animals .
C0027663
multiple primary tumors
C0027651
tumor