The short answer
Screening exists for only a few cancers. Most have no recommended test, several tests were studied and rejected, and no screen covers the gap between appointments.
Only breast, cervical, colorectal, and lung cancer have screening recommended for average-risk adults, with prostate handled as a shared decision.
Pancreatic, ovarian, kidney, stomach, esophageal, brain, uterine, bladder, and most blood cancers have no recommended screening test for people at average risk.
Ovarian screening was tested at scale and rejected. In the PLCO trial it did not reduce deaths, 9.6 percent of women had a false positive, 3.17 percent had surgery, and up to 15 percent of those surgeries caused a major complication.
Breast self-exam, clinical breast exam, and whole-body skin exams have not been shown to reduce deaths from the cancers they target.
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The full explanation.
The list is shorter than most people assume
There are more than a hundred types of cancer. Screening tests recommended for average-risk adults exist for four of them, plus prostate cancer handled as a shared decision rather than a routine test.
- Breast: mammography, generally from 40.
- Cervical: HPV testing and cytology, from 21 to 65.
- Colorectal: colonoscopy, stool tests, sigmoidoscopy, or CT colonography, from 45 to 75.
- Lung: annual low-dose CT for people 50 to 80 who meet smoking-history criteria.
- Prostate: PSA, offered as an individual decision for men 55 to 69, not recommended at 70 and older.
Everything else falls outside routine screening.
Cancers with no recommended screening test
For people at average risk, there is no recommended screening for pancreatic, ovarian, kidney, liver, stomach, esophageal, brain, uterine, bladder, testicular, or thyroid cancer, nor for leukemias, lymphomas, myeloma, or sarcomas.
The reasons repeat. Some of these cancers are uncommon enough that even an accurate test would generate mostly false positives. Some sit in organs that are hard to image without expensive or invasive procedures. Some grow too fast for periodic testing to catch them at a useful moment. And for several, finding the cancer earlier has not been shown to change how the disease ends.
High-risk surveillance is a separate matter. People with an inherited syndrome, chronic hepatitis B, cirrhosis, or Barrett esophagus may be monitored for cancers that have no general-population screening, because in those groups the arithmetic is different.
Tests that were studied and are not recommended
These are worth knowing about, because they are still sometimes offered.
Ovarian cancer screening. CA-125 blood testing and transvaginal ultrasound were tested in the PLCO trial across nearly 69,000 women. There was no reduction in ovarian cancer deaths. Along the way 9.6 percent of screened women had a false-positive result, 3.17 percent underwent surgery because of it, and up to 15 percent of those surgeries produced a major complication. The USPSTF recommendation is a Grade D.
Breast self-exam and clinical breast exam. NCI notes these have not been shown to reduce breast cancer deaths.
Whole-body skin examination. Not shown to reduce deaths from skin cancer in average-risk adults.
Thyroid screening by neck palpation or ultrasound. Not recommended in people without symptoms, and the reason is the thyroid overdiagnosis experience, in which large increases in diagnosis produced no change in death rates.
Whole-body MRI. Marketed directly to consumers and not recommended for average-risk people. It reliably produces incidental findings requiring further workup without demonstrated benefit.
Multi-cancer blood tests
Blood tests claiming to detect many cancers at once are the most prominent current entrant, and the honest status is unresolved. NCI states that whether these tests are effective for cancer screening in people without symptoms is unknown and needs to be assessed through randomized clinical trials. None has FDA approval for screening.
The two practical risks are worth naming before ordering one. A negative result may be read as an all-clear it cannot support, potentially leading someone to skip a colonoscopy or a mammogram that does have proven benefit. And a positive result starts a search across the whole body, sometimes ending without a located cancer and without a way to close the question.
Two gaps that apply even to the tests that work
The interval. Screening is a snapshot. Cancers diagnosed between a normal screen and the next scheduled one are called interval cancers, and they are a known and expected feature of every screening program rather than a sign of failure.
Symptoms. Screening is for people without symptoms. Once you have a symptom, you have left screening and entered diagnosis, and the two follow different rules. A recent normal mammogram is not a reason to wait on a new breast lump. A recent normal colonoscopy is not a reason to ignore rectal bleeding.
The most useful sentence to have ready is a short one: I know my last screening was normal, and this is new, and I want it evaluated.
Where the effort is better spent
For the many cancers with no screening test, prevention carries more weight than detection ever could. Not smoking, HPV and hepatitis B vaccination, alcohol moderation, weight and physical activity, sun protection, and testing your home for radon all lower the number of cancers that occur, rather than changing when they are found. That is the more durable form of protection, and it is available for cancers no test can catch.
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Common questions
Why is there no screening test for pancreatic cancer?
Two problems compound. The pancreas sits deep in the abdomen, so detecting a small tumor requires imaging that is expensive and not suited to routine use in millions of people. And pancreatic cancer is uncommon enough in the general population that even a fairly accurate test would produce far more false alarms than true findings, leading to biopsies and surgery on healthy pancreases. Surveillance does exist for people at high inherited risk, which is a different situation with different arithmetic.
What about the blood tests that claim to screen for fifty cancers?
They are being studied and they are not yet proven. NCI states that whether multi-cancer detection tests are effective for screening people without symptoms is unknown and needs to be assessed through randomized trials, and no such test has FDA approval for screening. The practical concerns are a negative result creating false reassurance, and a positive result triggering an extensive search that sometimes finds nothing. If you are considering one, ask what happens next in each scenario before you order it.
Should I do monthly breast self-exams or check my skin?
Being familiar with your own body is genuinely useful, and many cancers are found by the people who have them. What the evidence does not support is that formal, scheduled self-examination reduces deaths. NCI notes that breast self-exam and clinical breast exam have not been shown to reduce breast cancer deaths, and that skin exams have not been shown to reduce deaths from skin cancer. Awareness of change is worth having; it should not substitute for the screening tests that do have proven benefit.
If a cancer has no screening test, what can I actually do?
Two things carry most of the weight. Risk reduction, which is not screening, does more for many of these cancers than any test would: not smoking, alcohol moderation, HPV and hepatitis B vaccination, weight and activity, and testing your home for radon. And prompt evaluation of symptoms, since for cancers without screening, noticing a change and getting it looked at is the entire early-detection strategy.
My scan or blood work was normal. Does that rule out cancer?
It rules out what that particular test can see, in that particular part of the body, on that particular day. A normal mammogram says nothing about your pancreas. A normal colonoscopy says nothing about your lungs. Even within the target organ, no test detects everything. This is why a new, persistent, unexplained symptom deserves evaluation on its own merits regardless of when your last normal result was.
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Written by: Cancer Explained Editorial TeamSources last checked: 2026-07-30Last updated: 2026-07-30Next planned review: 2027-07-30
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How this page was created
Cancer Explained does not originate medical claims. Every page restates guidance already published by the National Cancer Institute, the CDC, the USPSTF and the FDA, in plain language, with the source cited so you can check the original yourself. AI does the translating and organizing; automated checks test claims, citations, clarity and safety before anything publishes. We do not employ clinicians and do not intend to — our work is translation and navigation, not clinical judgment. Nothing here is personal medical advice, and no page can account for your particular situation.
Editorial status: Source verified — This page was created with AI assistance and checked against the sources listed on it. Source checking is not a medical review.
Human medical review: not completed. Cancer Explained is not clinician-reviewed, and that is a deliberate design choice rather than a gap we are waiting to close. We restate published federal guidance and cite it; the authority belongs to the source, not to us. That is why every page names where its claims come from — so you can verify us instead of trusting us. Use it to understand your situation and to ask better questions of the people treating you.
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