Enzyme castration of animals and tumor treatment

Abstract From the Canadian patent

Male animals may be chemically castrated by injecting both testes and/or both spermatic cords with a castratingly effective amount of a protease enzyme such as chymopapain-rich enzyme preparation. Also, tumors in humans and animals may be injected with similar protease enzymes to destroy tumor cells. The enzyme preparation used for either of these purposes may comprise a vasoconstictor in sufficient concentation to cause constriction of precapillary arterioles in and about the tumor upon injection of the preparation into the tumor to inhibit migration of the enzyme from the tumor area.