Oncology is a branch of medicine that deals with the diagnosis and treatment of cancer. The term is also used to describe the science that deals with the causes of cancerous conditions. Oncologists deal with the prevention and diagnosis of cancer. There are a great many cancer conditions, which vary in incidence, different forms of treatment and prognosis. Oncologists are involved in the treatment of:

• breast cancer
• cervical cancers
• ovarian cancers
• prostate cancers
• testicular cancers
• tumors of the large intestine
• Skin tumors
• tumors of the stomach
• tumors of the liver
• tumors of the pancreas
• tumors of the brain