Final answer:
An oncologist is a specialist in diagnosing and treating malignant disorders such as tumors and cancer.
Step-by-step explanation:
A specialist in diagnosing and treating malignant disorders such as tumors and cancer is an oncologist.
Oncologists are medical doctors who specialize in the diagnosis, treatment, and follow-up care of patients with cancer. They use various diagnostic tools, such as imaging tests and biopsies, to determine the type and stage of cancer. Oncologists develop treatment plans that may include chemotherapy, radiation therapy, targeted therapy, or surgery.
Some common cancers treated by oncologists include breast cancer, lung cancer, colorectal cancer, and prostate cancer.