Coming from the Greek word “onkos” which means “tumor” or “mass“, oncology is the branch of science that deals with cancers. Hence, oncologists are medical doctors who specialize in the diagnosis, prevention, and treatment of cancer. There are four important sub-divisions within Oncologist profession namely: medical oncologist (chemotherapy or medications), a surgical oncologist (surgical procedure of a variety of tumors), radiation oncologist (megavoltage X-rays or radionuclides) and pediatric oncologist (physician specialized in childhood cancer).