An oncologist is a medical doctor who specializes in diagnosing and treating cancer. They work closely with patients to develop personalized treatment plans, which may include options like chemotherapy, radiation therapy, or surgery. Oncologists also monitor patients' progress and manage any side effects from treatments, ensuring the best possible care throughout the cancer journey. In addition to treating patients, oncologists often collaborate with other healthcare professionals, such as radiologists and surgeons, to provide comprehensive care. They also stay updated on the latest research and advancements in cancer treatment, helping to improve outcomes for patients battling this complex disease.