The short answer
Remission means cancer signs and symptoms have decreased or disappeared. No Evidence of Disease (NED) means current scans and blood tests show no detectable cancer. Doctors prefer these terms over 'cured' because microscopic cells below imaging limits may still exist.
Complete Remission and NED mean no cancer is currently detectable on tests.
Partial Remission means the tumor has shrunk significantly but is still visible.
Doctors avoid the word 'cured' because scans cannot detect individual microscopic cells.
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The full explanation.
Immediate Answer
Everyday conversation uses the phrase "cancer-free." Oncologists rely on more precise terms.
- Complete Remission: All signs and symptoms of cancer have disappeared on exams and lab tests.
- No Evidence of Disease (NED): Scans, physical exams, and blood tests show no cancer cells.
- Partial Remission: The cancer has shrunk in size or extent, but some disease can still be seen.
Doctors prefer remission or NED over "cured." Scans cannot pick up single cells.
Terminology Comparison Table
| Term | What It Means | What It Does NOT Mean | Why Doctors Use It |
|---|---|---|---|
| Complete Remission | All detectable signs of cancer are gone. | Does not guarantee that zero microscopic cells exist. | Reflects complete treatment response based on available tests. |
| No Evidence of Disease (NED) | Diagnostic scans (CT/PET) and blood tests show no tumor. | Does not mean surveillance scans can stop immediately. | Precise description of current imaging and lab findings. |
| Partial Remission | Tumor has shrunk, but some cancer is still detectable. | Does not mean treatment failed; it shows active disease control. | Used to guide whether treatment should continue. |
| Stable Disease | Tumor size has neither grown nor significantly shrunk. | Does not mean cancer is worsening; staying stable is often a goal. | Describes successful control in many advanced cancers. |
Why Don't Doctors Say "Cured"?
Scanners have limits. A CT, MRI, or PET scan can only show a tumor once it is large enough to see. A small number of cancer cells can be too small to show up on any follow-up test.
Those cells can stay quiet, then grow months or years later. When that happens, it is called a recurrence, and it does not mean your treatment was wrong. This is why oncologists say NED or complete remission instead of "cured." It is also why they ask you to keep a regular schedule of checkups, so any change is picked up early.
Sources
Words to know
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Common questions
Is No Evidence of Disease (NED) the same as being cured?
NED means all current tests, scans, and physical exams show no sign of cancer. Doctors use 'NED' rather than 'cured' because current technology cannot detect microscopic cancer cells that might remain dormant.
Questions to ask your doctor
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Your next step
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Last updated: 2026-08-11Next planned review: 2027-07-23
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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 checked — This page was written with AI assistance and checked line by line against the sources listed on it. That confirms the sources support what the page says. It is not a medical review, and it does not confirm the page is complete or right for your situation.
Human medical review: not completed. Pages here are not signed off by a clinician before they publish. That is not an oversight we are quietly working around: we restate published guidance and cite it, so the authority belongs to the source rather than to us, and every page names where its claims come from — you can verify us instead of trusting us. Where a volunteer clinician has reviewed a page, their name and credentials appear on it; where no name appears, no clinician has checked it. We are glad to have reviewers and are recruiting them, and we do not hold pages back waiting for one. Use this site to understand your situation and to ask better questions of the people treating you.
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