Oncology means bulk, mass, or tumor, and is the branch of medicine that deals with cancer. A medical doctor who practices oncology is an oncologist.
Oncology is concerned with:
• The diagnosis of any cancer in a person
• 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
• Screening efforts:
     - of populations, or
     -of the relatives of patients (in types of cancer that are thought to have a hereditary basis, such as breast  cancer)


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