A device designed a 3-millimeter long device outfitted with isolated pockets. Each pocket was loaded with very small sample of a cancer drug which is a translational medicine and currently 16 different cancer drugs can be tested at once. The device was injected directly into melanoma, prostate, or breast cancer tumors in a group of mice. Tissue samples were then tested for the tumor reaction to the drugs. Those samples were then compared to how the mice reacted when given a drug full dosage. The device proved to be a reliable and accurate way to predict each drug's effectiveness.