Oncology is a branch of medicine that deals with the prevention, diagnosis and treatment of cancer. A medical professional who practices oncology is an oncologist.
The three components which have improved survival in cancer are:
1. Prevention - This is by reduction of risk factors like tobacco and alcohol consumption
2. Early diagnosis - Screening of common cancers and comprehensive diagnosis and staging
3. Treatment - Multimodality management by discussion in tumor board and treatment in a comprehensive cancer centre