Screening is only useful where an effective test exists and early detection changes the outcome. That is true for a handful of cancers — and not for most. A whole-body scan is not a screening programme.
Screening with clear evidence
- Breast cancer — clinical examination and mammography, typically from age 40, earlier with strong family history
- Cervical cancer — Pap smear and HPV testing from the mid-twenties, repeated at intervals
- Oral cancer — regular examination, particularly for tobacco and gutkha users
- Colorectal cancer — stool tests or colonoscopy from age 45–50, earlier with family history
- Lung cancer — low-dose CT for long-term heavy smokers within defined age ranges
Where screening needs a conversation, not a default yes
PSA testing for prostate cancer can detect disease that would never have caused harm, and can lead to biopsies and treatment with real side effects. It is worth doing after a discussion of the trade-offs. Ovarian cancer screening with CA-125 and ultrasound has not been shown to reduce deaths in average-risk women.
If cancer runs in your family
Multiple relatives with breast, ovarian, colorectal or uterine cancer, cancer at an unusually young age, or two cancers in the same person may point to an inherited syndrome. Genetic counselling — not an unguided gene panel bought online — is the right next step, and can change screening timing for the whole family.
Risk reduction that genuinely works
- Stopping all forms of tobacco, including khaini, gutkha and smoking
- Limiting alcohol
- HPV vaccination for eligible girls and boys
- Hepatitis B vaccination, which lowers liver cancer risk
- Maintaining a healthy weight and regular physical activity
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Medical disclaimer: This page is general health information, not medical advice. Cancer treatment decisions depend on your reports, stage and overall health. Please consult a qualified oncologist before acting on anything you read here.