Articles and videos about Cancer breakthroughs and research, or inspirational stories from Cancer sufferers and survivors. Cancer is a class of diseases in which a group of cells display uncontrolled growth, invasion that intrudes upon and destroys adjacent tissues, and sometimes metastasis, or spreading to other locations in the body via lymph or blood. These three malignant properties of cancers differentiate them from benign tumors, which do not invade or metastasize. – created by Cynthia Yildirim