The most telling sign of uterine cancer is abnormal vaginal bleeding. For women who have gone through menopause, any vaginal bleeding at all is considered abnormal and needs evaluation. For premenopausal women, unusually heavy periods, bleeding between periods, or prolonged bleeding that’s different from your normal pattern can be a warning sign. Most people with uterine cancer notice bleeding changes before the disease has spread, which is why paying attention to this symptom matters so much.
Symptoms That Raise Concern
Abnormal vaginal bleeding is by far the most common symptom, but it’s not the only one. Some women notice a vaginal discharge that’s watery or blood-streaked, ranging from pinkish to containing visible blood. This discharge can appear even without full bleeding episodes and is easy to dismiss as hormonal changes or irritation.
Pelvic pain or a feeling of pressure in the lower abdomen is another symptom linked to uterine cancer, though it tends to appear later than bleeding does. Some women describe it as a dull ache that doesn’t go away, while others feel a sense of fullness or heaviness. Pain during intercourse can also occur. These symptoms overlap with many other conditions, from fibroids to ovarian cysts, so they don’t point to cancer on their own. But combined with abnormal bleeding, they deserve prompt attention.
Why Postmenopausal Bleeding Is Taken Seriously
If you’ve completed menopause and experience any vaginal bleeding, even light spotting, your doctor will want to investigate. That said, cancer is not the most likely explanation. Research shows that roughly 11% of women with postmenopausal bleeding are eventually diagnosed with endometrial cancer. That means about 9 out of 10 have a noncancerous cause, such as thinning of the vaginal walls, polyps, or hormone changes. Still, 11% is high enough that no postmenopausal bleeding should be ignored or assumed to be harmless.
Who Faces Higher Risk
Uterine cancer is strongly tied to estrogen. The lining of the uterus grows in response to estrogen, and when that exposure is prolonged or unopposed by progesterone, cells can begin to grow abnormally. This is why so many risk factors come back to estrogen levels in one way or another.
Obesity is one of the most significant risk factors. Fat tissue converts certain hormones into a form of estrogen, so carrying excess weight increases the amount of estrogen circulating in your body. Starting your period early (before age 12), going through menopause late, or never having been pregnant all extend the total number of years your uterine lining is exposed to estrogen.
Polycystic ovary syndrome (PCOS) is associated with roughly three times the average risk of uterine cancer, partly because women with PCOS often have irregular ovulation, which means less progesterone to counterbalance estrogen’s effects. Women who have taken estrogen-only hormone therapy without progesterone also face elevated risk.
Genetics play a role too. Women with Lynch syndrome, an inherited condition that increases the risk of several cancers, have a lifetime risk of uterine cancer as high as 60%. Having a first-degree relative (mother, sister, daughter) with endometrial cancer also raises your risk. If you know Lynch syndrome runs in your family, your doctor may recommend earlier or more frequent monitoring.
There’s No Routine Screening Test
Unlike cervical cancer, which has established screening through Pap tests and HPV testing, there is no recommended screening test for uterine cancer in women without symptoms. No major medical organization recommends routine ultrasounds or biopsies for women at average risk who aren’t experiencing problems. This makes recognizing symptoms yourself all the more important. The disease is typically caught because a woman notices something unusual and brings it up with her doctor, not because it’s found on a routine exam.
Women with Lynch syndrome are the exception. Because their lifetime risk is so high, doctors often recommend proactive monitoring strategies starting well before menopause.
How Uterine Cancer Is Diagnosed
If you report abnormal bleeding, your doctor will likely start with a transvaginal ultrasound. This imaging test measures the thickness of your uterine lining. In postmenopausal women, a lining thickness of 5 millimeters or more is generally considered the threshold that warrants further investigation. For premenopausal women, the normal range varies with your menstrual cycle, so interpretation is more nuanced.
The definitive test is an endometrial biopsy. This is usually done in the office using a thin, flexible tube (called a pipelle) inserted through the cervix to collect a small sample of uterine lining tissue. It takes only a few minutes and, while uncomfortable, doesn’t typically require anesthesia. Studies show this office biopsy has a sensitivity of about 94% and a specificity above 99% when compared to the more involved surgical sampling procedure (dilation and curettage, or D&C). In other words, the simple office biopsy catches the vast majority of cancers and almost never returns a false positive.
If the office biopsy is inconclusive, or if your doctor can’t obtain an adequate sample, a D&C may be performed. This is a brief surgical procedure done under sedation where a larger tissue sample is collected. Additional imaging, such as CT scans or MRI, may follow a cancer diagnosis to determine whether the disease has spread.
Types of Uterine Cancer
About 9 out of 10 uterine cancers are endometrial carcinomas, meaning they start in the inner lining of the uterus. The most common subtype, called endometrioid carcinoma, tends to grow slowly and is often caught early, which makes it highly treatable. Rarer subtypes, including serous carcinoma and clear cell carcinoma, are more aggressive. They grow faster and are harder to treat, though they account for a small fraction of cases.
Uterine sarcoma is a separate category altogether. It starts in the muscular wall of the uterus rather than the lining. Sarcomas are less common and generally more difficult to treat than endometrial cancers. They can also be harder to detect early because they don’t always cause the same kind of obvious bleeding.
What Happens After Diagnosis
If a biopsy confirms cancer, the next step is determining the stage and grade. The stage describes how far the cancer has spread: whether it’s still confined to the uterus, has reached nearby tissue, or has moved to distant organs. The grade describes how abnormal the cells look under a microscope, which helps predict how quickly the cancer might grow.
The majority of uterine cancers are caught at an early stage, while still confined to the uterus. When that’s the case, the outlook is favorable. Five-year survival rates for early-stage endometrial cancer are approximately 90%. For more advanced disease that has spread beyond the uterus, survival rates drop significantly, which underscores why early detection through symptom awareness is so valuable.
Treatment almost always involves surgery to remove the uterus, and often the ovaries and fallopian tubes as well. Depending on the stage and type, radiation, chemotherapy, or hormone therapy may follow. Recovery from surgery typically takes several weeks, and your care team will discuss what to expect based on your specific situation.
When Symptoms Deserve Attention
Any bleeding after menopause. Periods that are noticeably heavier or longer than usual. Bleeding between periods. A persistent watery or blood-tinged discharge. Pelvic pain that doesn’t have an obvious explanation. None of these symptoms mean you have cancer, but all of them are reasons to schedule an evaluation. The diagnostic process is straightforward, and most causes turn out to be benign. But when it is cancer, catching it early changes the outcome dramatically.