Cancer Screening Guidelines by Age: A Plain Summary

The simple versionExplain▾

Cancer screening means checking for cancer before you have any symptoms. Different cancers have different recommended starting ages, because each cancer behaves differently and each screening test has its own strengths and limits.

This article is a rough map, not a personal plan. Guidelines vary between expert groups and change over time, and your own age, health, and family history all matter. Use this as a starting point for a talk with your doctor.

These are general guidelines; your doctor tailors the plan to you.

Breast cancerExplain▾

Breast cancer screening usually means a mammogram, an X-ray of the breast that can find changes before they can be felt.

Guidelines vary. Many suggest that women at average risk consider starting mammograms in their 40s, with regular screening continuing through at least their mid-70s. Some groups recommend starting yearly, others every one to two years.

If you have a family history of breast cancer or other risk factors, your doctor may suggest starting earlier or adding other tests. This is a good area to discuss what fits your history.

For average-risk women, mammograms are commonly considered starting in the 40s.

Cervical cancerExplain▾

Cervical cancer screening looks for early changes in the cervix that could lead to cancer, using a Pap test, an HPV test, or both.

Screening generally begins in the mid-20s and continues, at intervals of several years, into the mid-60s for people who have had normal results. The exact test and timing depend on your age and past results, so your doctor will guide the schedule.

Cervical screening typically runs from the mid-20s into the mid-60s.

Colorectal cancerExplain▾

Colorectal cancer screening looks for cancer and for growths called polyps that could become cancer over time.

For adults at average risk, screening commonly begins around age 45 and continues into the mid-70s. After that, whether to keep screening is an individual decision based on health and past results.

There is more than one way to screen. Options include stool-based tests done at home and visual exams like colonoscopy. Because the choices differ in how often they are done and what they involve, ask your doctor which option fits you best.

Average-risk colorectal screening usually starts around age 45.

Lung cancerExplain▾

Lung cancer screening uses a low-dose CT scan, a special X-ray that makes detailed pictures of the lungs using a small amount of radiation.

It is not for everyone. It is generally recommended for certain older adults, often around ages 50 to 80, who currently smoke or recently quit and who have a significant smoking history. Your doctor can help you figure out whether you qualify, based on your age and smoking history.

Lung screening is for certain older adults with a significant smoking history.

Prostate cancerExplain▾

Prostate cancer screening is different from the others because it is not automatic. Instead of a set age when everyone starts, it is a personal decision.

Expert groups suggest that men aged 55 to 69 talk with their doctor about the benefits and harms of the PSA blood test and decide together. Some higher-risk men, such as Black men or those with a family history, may begin these conversations earlier. For most men 70 and older, routine screening is generally not recommended.

Prostate screening is a shared decision, not an automatic test at a set age.

Why guidelines are not one-size-fits-allExplain▾

You may notice that different groups suggest slightly different ages. That is normal. Experts review the same research but can weigh the benefits and harms a little differently, and guidelines update as new studies appear.

Your own situation matters just as much as the general rule. A strong family history, certain inherited gene changes, or a past cancer can change when to start and how often to screen. The best plan is the one you build with your doctor, using guidelines like these as a starting point.