In short
Endometrial cancer is the most common cancer of the female reproductive organs, and its earliest warning sign — abnormal bleeding — usually appears well before the disease spreads.
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Hemoglobin, Ferritin
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01
What It Is and Who It Affects
Endometrial cancer begins in the endometrium, the lining of the uterus, and is the most commonly diagnosed cancer of the female reproductive organs in many countries. It occurs mostly after menopause, though it can develop earlier, particularly in people with conditions linked to prolonged estrogen exposure without enough progesterone to balance it, such as PCOS or obesity. A less common, more aggressive form can also develop in normal-weight postmenopausal women without these risk factors, which is part of why any postmenopausal bleeding is evaluated regardless of body weight or other risk factors.
Compared with ovarian cancer, endometrial cancer has an important advantage: it usually announces itself early with a clear symptom, which is part of why it's caught at an earlier, more treatable stage more often than most other reproductive cancers.
02
The Symptom That Matters Most
Any vaginal bleeding after menopause is the single most important warning sign and should always be evaluated, even a small amount of spotting. Before menopause, warning signs include unusually heavy periods, bleeding between periods, or bleeding after sex that's new or different from a person's usual pattern.
Because so many benign conditions also cause abnormal bleeding, having this symptom doesn't mean cancer is likely — but it does mean an evaluation is the only way to know, and postmenopausal bleeding in particular should never be dismissed as 'probably nothing.'
03
How It's Diagnosed
Transvaginal ultrasound measures the thickness of the uterine lining, and a lining that's unusually thick after menopause prompts further testing. An endometrial biopsy, a brief in-office procedure sampling the uterine lining, is the definitive test, and it can usually be done the same day symptoms are evaluated.
If the biopsy is inconclusive or symptoms persist despite a normal result, hysteroscopy — a direct look inside the uterus with a thin camera — allows a more thorough sample of the lining to be taken.
04
Treatment
Surgery to remove the uterus, and often the ovaries and fallopian tubes, is the primary treatment for most cases, and because the disease is frequently caught early, many patients need no further treatment after surgery. More advanced or aggressive cases add radiation, chemotherapy, or hormone therapy.
For younger patients who haven't finished having children and have a very early, low-grade form of the disease, hormone therapy to treat the cancer while preserving the uterus is sometimes an option, discussed carefully with a gynecologic oncologist given the trade-offs involved.
05
Reducing Risk
Maintaining a healthy body weight, managing conditions like PCOS and diabetes, and using combined hormonal birth control, which several studies link to a lower long-term risk, are the main modifiable factors. Anyone who still has a uterus and is taking estrogen alone after menopause, without progesterone, should discuss the added endometrial cancer risk with their doctor, since progesterone is typically added specifically to offset it — this doesn't apply to estrogen-alone therapy after a hysterectomy, which is the standard regimen once the uterus has been removed.
The most protective single habit, though, is simple: reporting abnormal bleeding of any kind rather than waiting to see if it stops on its own.
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Sources
- Endometrial (Uterine) Cancercancer.gov
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