INTRATUMORAL CHEMOTHERAPY

IN AN EFFORT to improve survival from malignant gliomas, investigators have used intratumoral chemotherapy protocols to deliver high doses o f tumoricidal agents directly to the brain. Theoretically, these infus ions bypass the blood-brain barrier, minimize systemic drug levels and the side effects of chemotherapy, and achieve prolonged elevations of intracerebral chemotherapeutic agents relative to those obtainable by systemic administration. Almost all major classes of chemotherapeutic agents have been examined as possible intratumoral therapies via deli very approaches ranging from simple intratumoral injections to implant able computer-driven constant infusion pumps and biodegradable polymer matrices. In this review, we summarize the major clinical trials and experimental investigations underlying the development of intratumoral chemotherapy as a treatment for gliomas.