Human bodies are made up of uncountable cells and they usually grow and divide as needed. When something goes wrong in this process, cells continue to produce new cells but the old ones do not die as they should. The uncontrolled proliferation of abnormal growth of cells in the body causes cancer. This branch of medicine is known as oncology, and the medical professionals who specialize in oncology are called oncologists. They diagnose patients with cancer, evaluate stages of the...