When chemotherapy is placed directly into the cerebrospinal fluid or an organ, the drugs mainly affect tumor cells in those areas (regional chemotherapy).

Regional treatment means the anticancer drugs or biologic substances are placed directly into an organ or a body cavity such as the abdomen, so the drugs will affect cancer cells in that area.

When chemotherapy is placed directly into the spinal column, an organ, or a body cavity such as the abdomen, the drugs mainly affect cancer cells in those areas.