#$%^&*AU2008255139B220131003.pdf#####ABSTRACT The invention relates to a pharmaceutical composition for the treatment of a solid malignancy chosen from the group consisting of colon tumour, gastric tumour, mammary tumour, ovarian tumour, prostate tumour, and renal tumour, said 5 composition comprising a salt of meta-arsenite (AsO2 ~) and a pharmaceutically acceptable auxiliary. The invention also relates to its use and to a method of treatment. N: Melbourne CaBes Patent 54000-54999 P54621.AU.1 Specis Specification as filed.doc