Cancer Screening Guidelines by Age: A Plain Summary

Cancer screening means checking for cancer before you have any symptoms. Different cancers have different recommended starting ages. That is 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. Your own age, health, and family history also matter. Use this as a starting point for a talk with your doctor.

The sections below go one cancer at a time.

Use these ages as a guide, then build your own plan with your doctor.

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

The organizations do not agree, so it is worth knowing whose rule you are being given. The US Preventive Services Task Force, in 2024, recommends screening every other year from age 40 through 74 for women at average risk, and grades that B. The American Cancer Society offers annual screening from 45, with the option to start at 40 and a move to every other year from 55. Both leave room for starting earlier if your risk is above average.

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, the USPSTF now recommends mammography every other year from age 40 to 74.

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

The schedule below is the US Preventive Services Task Force's, for people at average risk with a cervix. Screening begins at age 21. From 21 to 29, it recommends a Pap test every 3 years. From 30 to 65, there are three accepted options: a Pap test every 3 years, an HPV test every 5 years, or both together every 5 years. The American Cancer Society starts at age 25 and prefers an HPV test every 5 years. Ask your clinic whether any HPV testing can be done without a full exam. Most people can stop after 65 if they had enough normal results in the past 10 years (for the USPSTF, 3 normal Pap tests or 2 normal HPV tests in a row, the latest within 5 years) and no history of high-grade precancer or cervical cancer. If your cervix was removed in a hysterectomy, you may be able to stop sooner, but only if you never had high-grade precancer (CIN 2, CIN 3, or AIS) or cervical cancer. Your own history may change this, so your doctor will confirm the schedule that applies to you.

Cervical screening runs from age 21 to age 65.

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. From 76 to 85, 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. 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 cancer screening uses a low-dose CT scan. This is a special X-ray that makes detailed pictures of the lungs using a small amount of radiation.

It is not for everyone. The USPSTF recommends annual low-dose CT for adults aged 50 to 80 who meet two conditions. They have a 20 pack-year smoking history. And they either still smoke or quit within the past 15 years. It says to stop once someone has not smoked for 15 years, or develops a health problem that would rule out treatment. 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 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.

The USPSTF says men aged 55 to 69 should talk with their doctor about the benefits and harms of the PSA (prostate-specific antigen) blood test and decide together. The American Cancer Society suggests starting that talk at 50, or at 45 for Black men and men with a family history. The USPSTF recommends against PSA screening for men 70 and older.

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

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. Guidelines also 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.