Neoplasm or tumor: abnormal mass of tissue as a result of abnormal growth and division.
Benign: incapable of indefinite growth, Do not invade surrounding tissues
Malignant: capable of indefinite growth, invasive, metastasis
During metastasis, some of the cancer cells are separated from the original tumor mass and are
transferred by blood or lymph to other parts of the body where they can reside and proliferate. In
this way, a primary tumor at one site can give rise to a secondary tumor at another site.
Carcinogen:Any chemical substances, physical agents or types of radiation that can induce DNA
mutations and lead to the development of cancer.
Oncogene:Agene that encodes a protein capable of inducing malignant transformation.