Tumor vs Cancer
While they have some similarities, the terms tumor and cancer are not the same. Unusual cell growth, known as a tumor, can be malignant (cancerous) or benign (not harmful). Generally not life-threatening, benign tumors do not metastasize to other parts of the body. By applying pressure to surrounding tissues or organs, they can still be problematic. Nevertheless, the unchecked development and dissemination of aberrant cells is the hallmark of cancer. Cancer cells can travel to other areas of the body by the lymphatic or circulatory systems, as well as by invading adjacent tissues and organs. Cancer may pose a life-threatening threat if untreated.