Chemoembolization  is the delivery of chemotherapy drugs directly to the site of a cancer tumor.  This procedure is used most often to treat cancers of the endocrine system, including melanoma and liver cancers.

Since the chemotherapy drugs are delivered into the tumor, stronger doses of the drugs may be used.  This technique may help to decrease the number of side-effects of standard chemotherapy because the drugs are trapped within the tumor and are not circulating through the body.