Oncology is a branch of medicine that deals with tumours.
A medical professional who practices oncology is an oncologist.
Oncology is concerned with:
The diagnosis of any cancer in a person (pathology).
Therapy (e.g. surgery, chemotherapy, radiotherapy and other modalities).
Follow-up of cancer patients after successful treatment.
Palliative care of patients with terminal malignancies.
Ethical questions surrounding cancer care.
of populations, or
of the relatives of patients (in types of cancer that are thought to have a hereditary basis, such as breast cancer)