The term "human cancer" refers to any type of abnormal growth of cells that originate in a human body. Cancer is characterized by uncontrolled cell division and can spread to other parts of the body through the bloodstream or lymphatic system. There are many different types of cancer, including breast, lung, colon, prostate, skin, ovarian, and others. These diseases can be caused by a combination of genetic factors, environmental influences, and lifestyle choices. Cancer is often treated with surgery, radiation therapy, chemotherapy or targeted drug therapies, depending on the type and stage of the disease.