Oncologists are medical doctors who specialize in diagnosing and treating cancer. They use various methods, including chemotherapy, radiation therapy, and immunotherapy, to help manage the disease. Oncologists work closely with patients to develop personalized treatment plans based on the type and stage of cancer, as well as the patient's overall health. In addition to treating cancer, oncologists also play a crucial role in cancer prevention and research. They may participate in clinical trials to test new treatments and improve existing therapies. Oncologists often collaborate with other healthcare professionals, such as radiologists and surgeons, to provide comprehensive care for cancer patients.