Cancer is a group of diseases involving abnormal cell growth with the potential to invade or spread to other parts of the body. These contrast with benign tumors, which do not spread to other parts of the body. Cancer is a broad term. It describes the disease that results when cellular changes cause the uncontrolled growth and division of cells.

Anticancer Drug, also called Antineoplastic Drug, any drug that is effective in the treatment of malignant, or cancerous, disease. There are several major classes of all Types of Cancer; these include alkylating agents, antimetabolites, natural products, and hormones. In addition, there are a number of drugs that do not fall within those classes but that demonstrate anticancer activity and thus are used in the treatment of malignant disease.