Oncology is the branch of medicine that focuses on the diagnosis, treatment, and management of cancer. It encompasses various specialties, including medical oncology (chemotherapy and systemic treatments), surgical oncology (tumor removal through surgery), and radiation oncology (treatment using targeted radiation).

Oncologists work closely with other healthcare professionals to develop individualized care plans aimed at controlling or eliminating cancer, reducing symptoms, and improving quality of life. Oncology also involves cancer prevention, early detection, and research into new therapies.