Synthetic retinamides: effect on urinary bladder carcinogenesis by FANFT in Fischer rats

The failure of N-ethylretinamide and N-(2-hydroxyethyl)retinamide to inhibit the incidence or severity of bladder carcinoma in female Fischer rats initiated with N-[4-(5-nitro-2-furyl)-2-thiazolyl]formamide supports the concept that the inhibition of bladder carcinogenesis by natural and synthetic retinoids is carcinogen-class specific.