The effects of D-penicillamine on the growth and metastasis of Lewis lung c
arcinoma have been studied. D-penicillamine administration resulted in sign
ificant retardation and inhibition of primary tumor growth and in drastic r
eduction of metastatic volumes. Zinc sulphate treatment gave the opposite r
esults promoting the metastatic growth. The combined treatment with D-penic
illamine and zinc sulphate was shown to suppress metastasis only in 44% of
cases.