What is oncology?

this is a word which i found in my biology textbook

http://www.ons.org/
http://www.fda.gov/cder/cancer/
http://www.cancernetwork.com/
Please click tha above links to know in detail

Oncology is the medical subspecialty dealing with the study and treatment of cancer. A physician who practices oncology is an oncologist. The term originates from the Greek onkos (慰谓魏慰蟼), meaning bulk, mass, or tumor and the suffix -ology, meaning "study of".

Oncologists may be divided based on the type of treatment provided.

Surgical oncologists: who are surgeons who specialize in tumor removal.
Medical oncologists: who deal with using medication or chemotherapy to treat cancer.
Radiation oncologists: people who specialize in the treatment of cancer with radiation, a process called radiotherapy.
N.B. In the UK, the majority of oncologists are known as Clinical Oncologists, and are fully qualified to practice both chemotherapy and radiotherapy. In most other countries these disciplines are more clearly segregated.
Oncologists may also be categorized based on the patient type.

Gynecologic oncologist: who specialize in the treatment of cancer in women. He/She can performs and give chemotherapy and assists in radiation therapy for these cancers in women.
Pediatric oncologist: who specialize in the care of children with cancer.
Oncology is concerned with:

The diagnosis of cancer
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 heritable basis, such as breast cancer).
The oncologist often coordinates the multidisciplinary care of cancer patients, which may involve physiotherapy, counselling, clincal genetics, to name but a few. On the other hand, the oncologist often has to liaise with pathologists on the exact biological nature of the tumor that is being treated.

The field of medicine pertaining to cancer .

Oncology is the medical subspecialty dealing with the study and treatment of cancer.