Chemotherapy can be highly effective at treating cancer, but doctors often cannot prescribe the optimal cancer-killing dose due to systemic toxic side effects. When chemotherapy is administered to a cancerous organ via intra-arterial infusion, 50% to 80% of the drug generally does not remain in that organ. The excess passes on to the veins that drain the organ, entering the circulatory system, where it gets distributed to the rest of the body. Researchers from the University of California, Berke...