Oncology is typically defined as the branch of medicine that specializes in the diagnosis, treatment, and management of cancer. Cancer is a group of diseases that occurs when certain cells start to grow uncontrollably and form an abnormal mass called a tumor.
The disease may spread to other parts of the body, forming cancer tissue in those parts, in the advanced stage. This is known as metastasis and the patient needs more aggressive treatment at this stage. Cancer may develop in all ages of all gender and ethnicity.
There are various risk factors that may increase the chances of getting cancer in a person. The specialist who deals with cancer patients is known as an oncologist. They are trained to diagnose and treat all kinds of cancers in the body. Oncology is further divided into multiple sub-specialties as per the treatment option.