The short answer
After treatment for endometrial cancer, ACS says to see your doctor right away for bleeding and other warning signs. ACS says routine blood tests and scans are not needed without symptoms or exam changes, so exams and your own report matter. Mismatch repair and POLE results shape the drug choices.
ACS says to see your doctor right away, not at the next visit, for bleeding from the vagina, bladder or rectum after treatment.
ACS says routine blood tests and scans are not needed if there are no symptoms or exam changes. A CA 125 blood test, scans or a biopsy may be done if symptoms or the exam suggest it came back.
For early-stage disease, NCI says vaginal brachytherapy had fewer bowel side effects than external beam radiation. Ask your team whether radiation is possible if you had it before.
Mismatch repair status sorted patients in both the pembrolizumab-lenvatinib and RUBY dostarlimab trials, so ask what yours showed.
On this page
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The whole article, with every detail and caution.
This page is for people whose endometrial cancer may have come back, or who are watching for it after treatment. It covers warning signs, how a recurrence is found, treatment options NCI describes, and questions to bring to your team.
Bleeding is the signal that matters most
The American Cancer Society (ACS) lists warning signs after endometrial cancer treatment. It says to see your doctor right away, and not wait for your next appointment, if you notice:
- Bleeding from the vagina, bladder, or rectum.
- Decreased appetite or weight loss you cannot explain.
- Pain in the pelvis, hips, belly, or back.
- A cough or feeling short of breath.
- Swelling in your belly or legs.
After a hysterectomy there is no period to explain away bleeding. Call about any bleeding.
NCI gives similar advice in a different setting. A woman taking tamoxifen who has abnormal vaginal bleeding should have a follow-up exam and a biopsy of the lining if needed. That guidance is about tamoxifen, not about follow-up after treatment. Ask your own team what their plan is for checking bleeding.
How a recurrence is found
ACS says that if symptoms or the exam suggest the cancer may have come back, your team may order scans, a CA 125 blood test, or a biopsy. ACS also says that without symptoms or exam changes, routine blood tests and scans are not needed.
So the pelvic exam and your own report carry a lot of weight. ACS adds that if endometrial cancer does come back, it is most likely within the first few years after treatment.
Radiation to the top of the vagina
Brachytherapy is radiation placed inside the body, close to the tumor. For stage I disease, NCI says vaginal brachytherapy had fewer bowel side effects and better quality of life than external beam radiation, with no difference in vaginal recurrence at 5 years. NCI calls it the preferred option after surgery for stage I.
NCI does not give rules here for recurrence. If you had radiation before, ask exactly where the beams went. Ask whether more radiation is possible.
Retesting the tumor before drugs are chosen
NCI's professional summary describes four molecular groups in this cancer. One is the POLE group. A POLE mutation is linked to a good prognosis, and NCI says adjuvant therapy (extra treatment after surgery) is avoided for it. Whether that applies to you depends on the rest of the pathology, so ask rather than assume.
Two trials are described by NCI. In one, called KEYNOTE-775, pembrolizumab and lenvatinib were compared with chemotherapy. Women had advanced or recurrent cancer that grew after a platinum-based treatment. In the other, called RUBY, dostarlimab was added to chemotherapy. The gain was largest in women whose tumor had a fault in mismatch repair (the system cells use to fix mistakes in their DNA).
Both trials sorted women by mismatch repair status. So ask whether yours has been done, and what it showed. FDA labels say which uses are approved. Your team decides what fits you.
Questions for the gynecologic oncologist
- Which finding started this: bleeding, an exam, or a scan?
- Will you biopsy it before changing anything?
- Is it only at the top of the vagina, or beyond the pelvis?
- Have I had radiation there before? Can I have it now?
- What did my mismatch repair and POLE tests show?
- Does that make dostarlimab or pembrolizumab an option?
- Is surgery still on the table, or is this a drug decision?
Ask which result is still pending. Ask whether waiting for it changes anything, and ask for the plan in the visit notes.
When to get help sooner
- Call 911 or go to an emergency department if vaginal bleeding soaks through a pad and does not slow, or you feel faint or pass out with it. Do the same for sudden shortness of breath, sharp chest pain, or coughing up blood. MedlinePlus says to call 911 for these signs of a clot in the lung. Do not drive yourself.
- Call your care team right away if vaginal bleeding or spotting starts again, or you have bleeding from the bladder or rectum. Also call right away for new pelvic, hip, belly or back pain, a new cough, weight loss, swelling in your belly, or one leg that becomes swollen, red, or painful. ACS says to see your doctor right away for these.
- Call your care team right away, day or night, if you are on chemotherapy or have low white blood cell counts and you have a temperature of 100.4°F (38°C) or higher, chills, a sore throat, mouth sores, burning when you urinate, or redness where a catheter enters your body. A normal temperature is not a reason to wait. CDC says to call your doctor immediately for a fever during chemotherapy. NCI says infections during cancer treatment can be life threatening. If you cannot reach your team, go to the nearest emergency department.
- Call your care team within a day or two if vaginal discharge changes, urinating becomes difficult or painful, sex becomes painful, or your bowel or bladder habits change.
Related pages
Cancer Staging and Biomarker Testing explain the terms that come up most when endometrial cancer comes back. Clinical Trial vs Standard Treatment, Palliative Care, and Questions to Ask Your Doctor cover the decisions that follow an endometrial cancer recurrence.
Where this comes from
These questions were drawn from current patient guidance for endometrial cancer:
- NCI PDQ — Endometrial Cancer Treatment (Patient Version)
- NCI PDQ — Endometrial Cancer Treatment (Health Professional Version), molecular classification, radiation and immunotherapy trials
- NCI — Drugs Approved for Endometrial Cancer
- American Cancer Society — Follow-up Care After Endometrial Cancer Treatment
- MedlinePlus — Pulmonary embolus
- CDC — Watch Out for Fever
- NCI — Infection and Neutropenia during Cancer Treatment

Common questions
Is bleeding after treatment always a recurrence?
No, but it is always worth checking. NCI's guidance for women on tamoxifen is that abnormal vaginal bleeding should prompt a follow-up exam, and a biopsy of the endometrial lining if needed. That advice is written for women taking tamoxifen rather than for recurrence follow-up, but the habit is the same: bleeding gets looked at.
Will a blood test tell us it has come back?
Not routinely. ACS says that if there are no symptoms or exam changes, routine blood tests and scans are not needed. If symptoms or the exam suggest it may have come back, a CA 125 blood test, scans or a biopsy may be done. That is why the pelvic exam and what you report matter so much.
Can I have radiation if I had it before?
It depends on what you had before. Ask your team exactly what radiation you received and where it was aimed, and whether more is possible. For stage I disease, NCI says vaginal brachytherapy was the preferred option after surgery, with fewer bowel side effects.
Which test decides whether immunotherapy is an option?
Mismatch repair status. In the RUBY trial, adding dostarlimab to chemotherapy helped most in women whose tumor had a mismatch repair fault. POLE results matter too. NCI describes a POLE mutation as linked to a good prognosis, and says adjuvant therapy is avoided in that group. That judgement is made case by case with the full pathology.
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Sources last checked: 2026-08-11 what this meansLast updated: 2026-09-29Next planned review: 2028-07-30
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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, and this 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 then compared with the sources listed on it, looking for statements those sources do not back up. That check is not a sentence-by-sentence record and can miss errors. 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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- Cancer Staging: What the Stage Means
- Biomarker Testing and Precision Medicine
- Getting a Second Opinion After a Diagnosis
- Questions to Ask About Endometrial Cancer Treatment
- Metastatic Endometrial Cancer: What to Ask
- Endometrial Cancer Survivorship Follow-Up Questions
- Coping With Fear of Recurrence
