Cancer Screening
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Find your personalized screening schedule for breast, cervical, colorectal, and lung cancer based on the latest 2024 USPSTF guidelines.
| Screening | Who | Ages | Frequency |
|---|---|---|---|
| Mammogram | Women | 40-74 | Every 2 years |
| Cervical (Pap) | Women | 21-29 | Every 3 years |
| Cervical (HPV/co-test) | Women | 30-65 | HPV every 5yr, or Pap every 3yr |
| Colorectal | All | 45-75 | Colonoscopy 10yr, or annual FIT |
| Lung (LDCT) | Smokers/Former | 50-80 | Annual, if 20+ pack-years |
| Prostate (PSA) | Men | ~55+ | Individualized discussion |
These reflect average-risk guidelines. Family history or other risk factors may warrant earlier or more frequent screening — discuss with your doctor.
Why Screening Ages Changed in 2024
It's worth understanding that USPSTF recommendations specifically apply to people at average risk — those with a family history of certain cancers, genetic risk factors (like BRCA mutations), or other elevated-risk conditions typically need earlier or more frequent screening, determined individually with a doctor rather than by these general population guidelines.
Breast Cancer: Mammogram Screening
The 2024 USPSTF guidelines recommend biennial (every 2 years) mammogram screening starting at age 40 and continuing through age 74 for women at average risk — a meaningful change from the previous 2016 guidance that recommended starting at 50. For women 75 and older, USPSTF states there isn't yet sufficient evidence to make a clear recommendation either way, making this an individualized decision based on overall health and life expectancy. It's worth noting that some other organizations, including the American Cancer Society, recommend annual (rather than biennial) screening starting slightly earlier for some risk groups — genuine, good-faith differences exist between major guideline bodies, which is part of why discussing your specific situation with your doctor matters.
Cervical Cancer: Pap and HPV Testing
👩 Ages 21-29
Pap test (cervical cytology) every 3 years. HPV testing alone isn't currently recommended for this younger age group specifically.
👩🦳 Ages 30-65
Either an HPV test every 5 years, a Pap test every 3 years, or "co-testing" (both tests together) every 5 years — all considered acceptable options.
Screening is generally not recommended before age 21 (cervical cancer is rare in this group) or after age 65 for women with a history of consistently normal results and no other risk factors. Women who received the HPV vaccine should still follow standard screening recommendations, since the vaccine doesn't cover all cancer-causing HPV strains.
Colorectal Cancer: Now Starting at 45
USPSTF lowered the recommended starting age for colorectal cancer screening from 50 to 45 in response to rising colorectal cancer rates among younger adults — a genuinely significant shift in cancer epidemiology that prompted the guideline change. Screening options include colonoscopy every 10 years, annual stool-based testing (FIT), or several other approved methods, with screening generally continuing through age 75. This flexibility in testing method matters practically — colonoscopy remains the most thorough single test, but annual stool-based testing is a genuinely valid, less invasive alternative for people who prefer it or face access barriers to colonoscopy.
Lung Cancer: Screening for Smokers and Former Smokers
USPSTF recommends annual low-dose CT (LDCT) lung cancer screening for adults aged 50-80 who have a 20 pack-year or greater smoking history and currently smoke or quit within the past 15 years. A pack-year is calculated as packs smoked per day multiplied by years smoked (e.g., 1 pack/day for 20 years, or 2 packs/day for 10 years, both equal 20 pack-years). This screening is specifically targeted at this higher-risk population rather than the general population, since lung cancer screening for non-smokers hasn't shown the same clear benefit-to-risk balance in research.
Prostate Cancer: An Individualized Decision
Unlike the other screenings covered here, USPSTF does not issue a blanket recommendation for routine PSA-based prostate cancer screening. Instead, it recommends an individualized decision made after discussing the specific benefits (early detection) and risks (overtreatment of slow-growing cancers that may never have caused problems) with a doctor — typically beginning this conversation around age 55 for average-risk men, or earlier for men at higher risk (including Black men and those with a family history of prostate cancer, both recognized as elevated-risk groups).
How UK NHS Screening Compares
The UK's NHS screening programs differ meaningfully from US USPSTF guidelines in several respects, worth knowing if you're comparing guidance across countries. NHS breast screening currently invites women aged 50-70 every 3 years — notably later starting age and less frequent than the 2024 USPSTF 40-74 biennial recommendation. NHS cervical screening invites women aged 25-64, using primary HPV testing, with intervals of 3 years for ages 25-49 and 5 years for ages 50-64. NHS bowel (colorectal) cancer screening has been expanding its starting age downward in recent years, moving toward age 50 in England (compared to the US 45), using a home stool test (FIT) as the primary method rather than colonoscopy. These differences reflect different national health systems, population studies, and cost-effectiveness analyses rather than one country being simply "right" — if you're eligible for both a UK NHS program and considering US guidelines, following your country's actual screening program invitations remains the most practical approach.
Related Health Context
Screening decisions often intersect with broader risk-factor management. If smoking history is relevant to your lung screening eligibility, our Framingham vs QRISK3 Comparison tool also factors in smoking for cardiovascular risk. Our Life Expectancy Calculator covers other modifiable factors relevant to overall preventive health planning.
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