Prevention
Cancer screening: questions worth asking
Screening is done before symptoms and always has potential benefits, limitations and risks.
7 min read · Updated 2026-07-26Key points
- Screening is not the same as diagnostic treatment of symptoms.
- Age, gender, family history and previous findings influence the recommendation.
- False positives, false negatives and overdiagnosis are possible.
What screening can and cannot do
Screening tries to detect a specific disease before symptoms appear. A good program can reduce mortality from some types of cancer, but no test is perfect.
If you already have a symptom, don't wait for a routine screening. Then a conversation about a diagnostic assessment is needed.
Four useful questions
The decision should take into account individual risk and local programs. Ask a health professional what is recommended in your situation.
- What is the expected benefit for me?
- What are the possible harms and false results?
- What happens if the finding is abnormal?
- How often and until what age is the test repeated?
Keep previous results
Date, type of test and previous result help to avoid unnecessary repetition. If you have a strong family history of cancer, tell who got it and at what age.
Sources
This guide provides general information and is not medical advice, a diagnosis or a treatment recommendation. Consult a qualified healthcare professional for decisions about your health.