Cancer is just a bad word for grouping things. A hard tumor (say bone cancer/osteosarcoma) is vastly different than say leukemia. Cancers types are Carcinoma

Cancer is just a bad word for grouping things. A hard tumor (say bone cancer/osteosarcoma) is vastly different than say leukemia. Cancers types are Carcinoma (surfaces of the body i.e. skin), Sarcoma (tumors that originate in hard or soft tissue i.e. bone cancer), Lukemia (start in the blood, no tumors), Lymphoma (Hodgkin, Non-Hodgkin), Multiple Myeloma (starts in plasma cells), Melanoma (skin cancer), Brain and spinal cords, Germ cell (starts in sperm or egg cells but can be anywhere in the body), Neuroendocrine tumors (from cells that produce hormones), Carcinoid tumors (slow growing tumors in the rectum and small intestine and spreads to the liver). Cancer definition - The bad cells can spread to other areas of the body. Benign tumors do not spread into, or invade, nearby tissues. - http://www.cancer.gov/about-cancer/what-is-cancer http://www.cancer.gov/about-cancer/what-is-cancer