those rats fed a wheat bran supplement during carcinogen administration and then switched to a fiber-free diet afterwards had the highest tumor yield , 4.5 times as many benign and malignant tumors as in those rats consistently fed the fiber-free diet ( p less than 0.05 ) and at least 6 times as many adenomas as any of the other dietary groups ( p less than 0.05 ) .
C0027651
tumor
C0006826
malignant tumors