Cancer screening: choose tests for your risk

Screening has a specific purpose

Cancer screening looks for signs of a particular cancer or precancer in people without symptoms. It is different from investigating a symptom or monitoring someone previously treated for cancer. Tell the clinic which situation applies to you before choosing a package.

Useful screening decisions depend on the cancer, test, age, previous results, personal history and family history. A screening menu is not a personalised recommendation. Bring the date and result of earlier screening so the clinician can explain whether another test is due or whether a different follow-up pathway is needed.

Understand both benefits and harms

Some screening tests can reduce harm from particular cancers, but not every available test has demonstrated that benefit. Screening can also produce false alarms, miss disease, or detect a cancer that would never have caused problems. Additional tests and treatment may themselves cause harm.

Ask the clinician to explain those tradeoffs for each proposed test, using your own circumstances. An abnormal screening result is not necessarily a cancer diagnosis. A normal result should not be used to dismiss a new or persistent symptom.

• Which cancer is this test intended to screen for?
• What evidence supports its use for someone with my history?
• What is the next investigation if the result is abnormal?

Distinguish national programmes from private packages

Korea's national screening programme and a privately purchased international-patient package are different arrangements. Eligibility, covered tests and cost sharing must be checked for the individual. Do not assume a visitor qualifies for the same programme as an insured resident.

A private package may offer tests beyond a national programme. Ask why each additional test is proposed, what it adds to your existing screening, and what it cannot establish. The package name, equipment list or number of tests does not answer those questions.

Agree the follow-up before testing

Find out who will contact you if a result needs attention and how you can ask questions from outside Korea. Ask for the report language, expected delivery method, and a named route for discussing tissue results or additional imaging. Avoid planning a screening visit without a realistic route to follow-up.

If you have a strong family history, prepare the relatives' relationship to you, the cancer type, and approximate age at diagnosis. A clinician can decide whether ordinary screening advice is sufficient or whether a more specialised assessment is appropriate. Do not select genetic or tumour-marker testing solely because it appears in a premium package.