Final answer:
Direct instillation into sanctuaries for chemotherapy aims to maximize drug concentration at the cancer site for effective treatment while minimizing side effects, as it delivers chemotherapy drugs directly to the area with cancerous cells.
Step-by-step explanation:
Direct instillation into sanctuaries of specific regions affected by cancer refers to the administration of chemotherapy drugs directly into the site where tumorous cells reside. This localized delivery is primarily used to treat cancers that are confined to one area or where systemic chemotherapy might not be effective due to barriers like the blood-brain barrier. The purpose of this targeted approach is to provide a high concentration of the drug to the cancerous cells, aiming for total cell-kill for the eradication of the cancer cells while minimizing systemic exposure and thus reducing potential side effects.
Chemotherapy can be combined with other treatments such as surgery, radiation, and immunotherapy to enhance treatment efficacy. In some instances, chemotherapy is administered with curative intent; in others, it may be palliative, to prolong life or reduce symptoms. Either way, the goal of chemotherapy is the same: to stop the growth and spread of cancer cells.