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Cancer screening in older adults
A screening test helps only if the patient lives long enough to benefit from it — about ten years for breast and colorectal cancer; so in an older adult the decision rests on life expectancy, function and preferences, not on age alone, and screening stops when the harm (follow-up tests, overdiagnosis, complications) outweighs the benefit.
Why it matters in the exam
The exam presents an 82-year-old woman with advanced dementia who is invited for mammography, and asks what is right: stop screening, because life expectancy is shorter than the time to benefit. Or a very healthy 76-year-old man — colorectal screening may continue as an individual decision. Candidates need the ranges: colorectal 45–75 (in the United States; in Israel a faecal occult blood test at 50–74), 76–85 individual decision, over 85 — no.
Further ranges that are asked: mammography every two years at 40–74 by the current American recommendation (in Israel 50–74), and over 75 — insufficient evidence; cervix — stop over 65 after adequate normal screening; prostate — an individual decision at 55–69, and from 70 not recommended; lung — low-dose CT at 50–80 for smokers of 20 pack-years or more; and abdominal aortic aneurysm — a one-time ultrasound in men aged 65–75 who have ever smoked.
Life expectancy is estimated from age, diseases and function, and with published prognostic calculators.
Key points
- The time to benefit for breast and colorectal screening — about ten years.
- Decide by life expectancy, function and preferences.
- Colorectal: 76–85 individual, over 85 — no; in Israel 50–74.
- Prostate from 70 — no; cervix over 65 after normal screening — no.
- A symptom is always investigated — that is not screening.
Summary table
| Screening | Age range | When to stop |
|---|---|---|
| Colorectal | 45–75 (US); 50–74 annual occult blood test (Israel) | 76–85 individual; over 85 — no |
| Breast | Mammography every two years 40–74 (US); 50–74 (Israel) | Over 75 — insufficient evidence; by life expectancy |
| Cervix | Up to 65 | Over 65 after adequate normal screening — stop |
| Prostate | 55–69 shared decision | From 70 — not recommended |
| Lung | Low-dose CT 50–80, 20 pack-years, current smoker or quit within the past 15 years | Quit more than 15 years ago, or a life-limiting illness |
| Abdominal aortic aneurysm | One-time ultrasound, men 65–75 who smoked | One-time |
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Sources
- US Preventive Services Task Force recommendations — colorectal (2021), breast (2024), cervical (2018), prostate (2018), lung (2021) cancer screening and abdominal aortic aneurysm (2019), 2018–2024 — Age ranges and stopping screening
- Israeli Ministry of Health — national programmes for early detection of colorectal and breast cancer, current version — Target ages and intervals
- Lee et al. — Time lag to benefit after screening for breast and colorectal cancer (meta-analysis, BMJ), 2013 — Time to benefit
Sources are given for further reading; the text is written afresh and not copied from them.
Reviewed by the Examqo AI Professor · 2026-11-06. The text may contain errors; when in doubt, check the source.