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CauseThe main cause of most endometrial cancer is too much of the hormone estrogen compared to the body's progesterone level. 2 Estrogen makes the lining of the uterus (endometrium) grow thicker. Progesterone "opposes" estrogen—your progesterone level goes up then drops at the end of each menstrual cycle, making the thick endometrium layer shed away. This is what you know as menstrual bleeding. When there is too much estrogen in the body, progesterone can't do its job. The endometrium gets thicker and thicker. Over time, the endometrium cells can become cancerous. SymptomsThe most common symptom of endometrial cancer is abnormal vaginal bleeding after menopause . Up to 20% of women who have abnormal bleeding after menopause will have endometrial cancer. 1 "Abnormal" bleeding means unexpected bleeding. If you are taking hormone therapy after menopause, you can expect some bleeding. But if you have irregular bleeding that continues for 3 months or more, call your doctor. Abnormal bleeding in women older than 35 who have not started menopause may also be a symptom of endometrial cancer, though this is less common. In rare cases, an unexplained abnormal vaginal discharge may be an early symptom. Symptoms of more advanced endometrial cancer include:
Other conditions with similar symptoms include cervical cancer and dysfunctional uterine bleeding . What HappensNormally, the lining of the uterus (endometrium) builds up and then sheds every month. You know this shedding as menstrual bleeding. In most cases of endometrial cancer , the endometrium has built up, or thickened, and has stayed that way. This is called endometrial hyperplasia . From this "precancer" stage, the cells can grow quickly and out of control. These fast-growing cells are cancer cells. As the cancerous cells multiply, they form a mass of tissue. Some of this tissue mass passes out of the uterus through the cervix and vagina as part of abnormal bleeding. Abnormal bleeding occurs in 90% of women with endometrial cancer . 3 If endometrial cancer is not treated, it may spread from the uterus into deeper layers of the connective tissue around the uterus. As it progresses, it may spread to the pelvic lymph nodes and other pelvic organs. Advanced-stage cancer may spread to lymph nodes, to other organs in the pelvis, causing problems with kidney and bowel function, or to other organs in the body, such as the liver and lungs. The most common sites for spread (metastasis) of endometrial cancer are the vagina, lungs, and abdominal cavity. 4 The stage and grade of your cancer is one of the most important factors in selecting the treatment option that is right for you. The long-term outcome (prognosis) depends on the stage of your cancer. The stage of you cancer will be determined by what your doctor finds at the time of surgery. The grade of your cancer is determined by how the cancer cells look under the microscope. Endometrial cancer is the most common type of women's pelvic cancer. 2 Uterine sarcoma is a less common type of uterine cancer. For more information, see the following topics: What Increases Your RiskThe biggest risk factor for endometrial cancer is having too much estrogen and not enough progesterone . This is called "unopposed estrogen." (Your body makes progesterone. Man-made progesterone, as in birth control pills or hormone therapy, is called a progestin .) Long-term exposure to unopposed estrogen may occur as a result of:
Additional factors that increase your risk include:
Endometrial cancer has been linked to hereditary nonpolyposis colon cancer (HNPCC) . In women, this cancer often starts in the uterus and ovaries before it grows in the colon. The American Cancer Society recommends that a woman with a family history of HNPCC talk to her doctor about annual screenings with endometrial biopsy, starting at age 35. 6 Reducing your riskThere are some measures that can lower your risk for developing endometrial cancer.
When To Call a DoctorSchedule an appointment with your doctor if you have:
Symptoms of endometrial cancer can be mistaken for those of another condition, such as endometriosis . Watchful WaitingIf you are concerned about your symptoms or think you may have an increased risk for endometrial cancer, call and make an appointment with your doctor. Watchful waiting is not appropriate if you have symptoms that do not go away. Who To SeeHealth professionals who can evaluate your symptoms and your risk for endometrial cancer include:
Doctors who can manage your cancer treatment include: To prepare for your appointment, see the topic Making the Most of Your Appointment. Exams and TestsMost cases of endometrial cancer are diagnosed in an early stage. This is because women who have reached menopause usually see their doctors when they have vaginal bleeding. To check your symptoms, your doctor will perform a medical history and physical exam. The physical exam will include a pelvic exam and Pap test. An endometrial biopsy is needed to confirm a diagnosis of endometrial cancer. A biopsy removes a small sample of the lining of the uterus (endometrium) for examination under a microscope. Additional tests may include:
Testing for endometrial cancer may show that you have endometrial hyperplasia . This is not cancer but may develop into cancer. One type of hyperplasia, atypical adenomatous hyperplasia, progresses to cancer in about 1 out of 3 women. 7 Tests to determine the extent (stage) of endometrial cancer include:Your doctor will determine the stage of your cancer at the time of your surgery. Other tests done before surgery may include:
An imaging test may be done before surgery to look for spread (metastasis) of cancer in the abdomen and pelvis. This helps with planning for treatment. Imaging tests include the following:
After endometrial cancer is confirmed, surgery is usually done to remove the uterus, cervix , ovaries , and fallopian tubes . This is called a hysterectomy with bilateral salpingo-oophorectomy. Sometimes the pelvic lymph nodes are also removed. The removed tissue is examined to find out the stage and grade of cancer. Early Detection There is no early detection test for endometrial cancer. If you have abnormal vaginal bleeding, schedule an appointment with your doctor for a medical evaluation. Unexpected bleeding, or more bleeding than normal, can be a symptom of endometrial cancer. The American Cancer Society advises women who are nearing menopause to learn about the risks and symptoms of endometrial cancer. 6
Treatment OverviewEndometrial cancer detected in its early stages can be cured with surgery and close follow-up. Treatment choices depend on where the cancer is and how much it has grown. Treatment may include one or more of the following:
Initial treatmentAfter a diagnosis of endometrial cancer is confirmed, your doctor may recommend surgery to remove the uterus, ovaries, and fallopian tubes (hysterectomy with bilateral salpingo-oophorectomy). All tissues removed in surgery will be examined to determine the stage and grade of the cancer. Lymph nodes near the uterus will be examined to find out if cancer has spread outside of the uterus. 4 Treatment for endometrial cancer depends on the size of the cancer, the extent of the cancer's growth, and how the cancer cells look under the microscope.
Women who have a hysterectomy or radiation therapy to treat endometrial cancer can no longer become pregnant. Use home treatment measures to help manage the side effects of treatment. For more information, see the Home Treatment section of this topic. Your doctor also may prescribe medicines to control nausea and vomiting. If you have recently been diagnosed with endometrial cancer, you may experience a wide variety of emotions in reaction to your diagnosis. Most women will feel some denial, anger, and grief. There is no "normal" or "right" way to react to a diagnosis of cancer. You can take steps, though, to manage your emotional reactions to learning that you have endometrial cancer. Some women find that talking with family and friends is comforting, while others may need to spend time alone to understand their feelings about their disease. If your emotions are interfering with your ability to make decisions about your health and to move forward with your life, it is important to talk with your doctor. Your cancer treatment center may offer counseling services. You may also contact your local chapter of the American Cancer Society to help you find a support group. Talking with other women who have had similar feelings after a diagnosis such as yours can help you accept and deal with your disease. What to think about during initial treatmentMost treatments for endometrial cancer cause side effects. Side effects may differ, depending on the type of treatment used and your age and overall health. Your doctor can talk to you about your treatment choices and the side effects associated with each treatment.
Your quality of life becomes a critical issue when considering your treatment options. Be sure to discuss your personal preferences with your oncologist when he or she recommends treatment. Some women with endometrial cancer may be interested in participating in research studies called clinical trials. Clinical trials are designed to find better ways to treat cancer patients and are based on the most up-to-date information. Women who do not want standard treatments or are not cured using standard treatments may want to participate in clinical trials. These are ongoing in most parts of the United States and in some other countries for all stages of endometrial cancer. Ongoing treatmentAfter your initial treatment for endometrial cancer , it is important to receive follow-up care.
Treatment if the condition gets worseEndometrial cancer may come back (recur). But this is not likely when the first cancer is caught early and is low-risk. Of those cancers that do come back, nearly all do so within 3 years of the first diagnosis. This is why regular follow-up is extremely important after initial treatment. 7 Cancer that comes back only in the pelvic area sometimes is treated with radiation therapy . This may stop the progress of cancer and may even cure it if it is only in the vagina. If cancer has spread to other parts of the body, radiation therapy often provides relief ( palliation ) from symptoms. Chemotherapy may also be used. 10 And progestin hormone therapy often is used to slow the growth of cancer that has recurred or spread. Survival is significantly improved in up to 30% of women who receive progestin hormone therapy. 11 Participation in clinical trials to test new treatments may be appropriate if cancer has spread to other parts of the body and hormonal therapy is ineffective in stopping the growth. What To Think AboutIf you are perimenopausal or have not yet reached menopause , your menstrual period will end immediately after most treatments for endometrial cancer. If your uterus and ovaries have been removed or have had radiation therapy, your body will have a decrease in estrogen . Estrogen normally prevents:
Complementary therapiesComplementary therapies are not a substitute for the standard treatment recommended for endometrial cancer. But for some people, they can play an important part in managing stress and pain. In addition to conventional medical treatment, you may wish to try complementary therapies, such as:
Before you try any of these therapies, discuss their possible benefits and side effects with your doctor. Let him or her know if you are already using any such therapies. For more information, see the topic Complementary Medicine. End-of-life issuesCancer treatment has two main goals: curing cancer and making your quality of life as good as possible. For some people with advanced-stage cancer, a time comes when treatment to cure cancer no longer seems like a good choice. This can be because the side effects, time, and costs of treatment are greater than the hope of cure or relief. But this isn't the end of treatment. Palliative care of cancer can improve your quality of life. It can be difficult to decide when to stop treatment aimed at prolonging life and shift the focus to end-of-life care. For more information, see the topics: PreventionWhile some risk factors for endometrial cancer are inherited, such as a family history of endometrial or colon cancer , other risk factors are under your control. You can reduce your risk for developing endometrial cancer if you:
You have no risk for endometrial cancer if you have had your uterus removed ( hysterectomy ). Home TreatmentDuring medical treatment for any stage of endometrial cancer , you can use home treatment to help manage the side effects that may accompany endometrial cancer or cancer treatment. Home treatment may be all that is needed to manage the following common problems. If your doctor has given you instructions or medicines to treat these symptoms, be sure to follow them. In general, healthy habits such as eating a balanced diet and getting enough sleep and exercise can help control your symptoms. Home treatment includes the following:
Other issues that may arise include:
Many women with endometrial cancer face emotional issues as a result of their disease or its treatment.
Not all forms of cancer or cancer treatment cause pain. If pain occurs, many options are available to relieve it. If your doctor has given you instructions or medicines to treat pain, be sure to follow them. Home treatment for pain such as a nonsteroidal anti-inflammatory drug (NSAID) or an alternative therapy like biofeedback may improve your physical and mental well-being. Be sure to discuss any home treatment you use for pain with your doctor. Cancer treatment has two main goals: curing cancer and making your quality of life as good as possible. For some people with advanced-stage cancer, a time comes when treatment to cure cancer no longer seems like a good choice. This can be because the side effects, time, and costs of treatment are greater than the promise of cure or relief. But this isn't the end of treatment. Palliative care of cancer can improve your quality of life. It can be difficult to decide when to stop treatment aimed at prolonging life and shift the focus to end-of-life care. For more information, see the topics: MedicationsMedicines, such as chemotherapy , may be given after surgery for endometrial cancer , depending on the stage and grade of the cancer and the risk for the cancer to spread (metastasis) or recur. Progestin hormone therapy may be used if your cancer has recurred or spread or you are unable to have surgery or radiation therapy. Medication ChoicesMedication treatment for endometrial cancer may include hormone therapy or chemotherapy. 13 Progestin hormone therapy. Examples include:
Chemotherapy, used alone or in combination. Examples include: Treatment can often cause nausea and vomiting. Your doctor may prescribe medicines to control nausea and vomiting. These medicines may include:
What To Think AboutA premenopausal woman whose cancer is in a very early stage and is slow-growing (low-grade) may be a candidate for progestin hormone therapy rather than hysterectomy and thus may be able to keep her uterus for childbearing. 9 There is limited information on the effectiveness of progestin therapy compared to other treatments, so currently it is not considered a standard treatment. One study has shown that chemotherapy may work better than radiation against stage 3 and stage 4 endometrial cancer. Chemotherapy can have severe side effects. 10 SurgerySurgery to remove the uterus (hysterectomy) is the most common treatment for endometrial cancer . The surgeon will also remove the fallopian tubes, ovaries, and often the pelvic lymph nodes , which are examined to find out the extent of the cancer and to help plan your treatment. If examination of tissue determines that more aggressive cancer still may be in the lymph system, a lymphadenectomy may be done to remove and examine additional lymph nodes. Surgery has the highest cure rate of all treatments for endometrial cancer. Surgery Choices
What To Think AboutLaparoscopic surgery is an option for treating your endometrial cancer. This surgery is done with a tiny camera and special instruments. The surgeon puts these tools through several small incisions (cuts) in the belly. Some surgeons do this surgery by guiding robotic arms that hold the surgery tools. This is called robot-assisted laparoscopy. Most women have their ovaries removed after a diagnosis of endometrial cancer to make sure the cancer has not spread to the ovaries, to reduce the production of estrogen , and to slow cancer growth. And some women who have had endometrial cancer may be at greater risk of developing ovarian cancer . You will not be able to become pregnant or continue to menstruate after a hysterectomy. If you have not yet gone through menopause , it will begin as soon as your ovaries are removed. For more information, see the topic Menopause and Perimenopause. Other TreatmentRadiation therapy may be used to treat endometrial cancer . Radiation may be given internally by placing radioactive substances in the uterus or area of cancer (brachytherapy). Or it may be given externally by delivering radiation from an outside source (external beam X-ray). Radiation treatment of premenopausal ovaries will cause menopause and infertility. Other side effects of radiation can include: 14
Studies called clinical trials are being conducted to find ways to prevent, detect, diagnose, and treat endometrial cancer. Talk with your doctor to see whether clinical trials are available and whether you are a good candidate. Other Places To Get HelpOrganizations
Related InformationReferences
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