What is cancer?

Cancer is what we call a disease in which abnormal cells in the body begin to grow out of control. Normal cells grow and divide as the body needs them and when they die they are replaced by new cells. Sometimes cells don’t die and they form a mass or tumor. Tumors can be benign or malignant. Benign tumors are not cancer. They can usually be removed and rarely grow back. Malignant tumors are cancer. When they are removed they may grow back. Cells from malignant tumors can damage tissues and organs that are nearby. They can also spread (metastasize) to other parts of the body via the bloodstream or lymphatic system.