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Endometrial Cancer Screening (PDQ®): Screening - Health Professional Information [NCI] - Special Populations

Hormone Therapy

There is no evidence to suggest that screening women prior to or during estrogen-progestin therapy, also known as hormone therapy, would decrease endometrial cancer mortality.[1,2] Thus women on hormone therapy should have a prompt diagnostic work-up for abnormal bleeding. Although women using certain hormone regimens have an increased risk of endometrial cancer, most women who develop cancer will have vaginal bleeding. There is no evidence that screening these women would decrease mortality from endometrial cancer.

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General Information About Cervical Cancer

Cervical cancer is a disease in which malignant (cancer) cells form in the cervix. The cervix is the lower, narrow end of the uterus (the hollow, pear-shaped organ where a fetus grows). The cervix connects the uterus to the vagina (birth canal). Anatomy of the female reproductive system. The organs in the female reproductive system include the uterus, ovaries, fallopian tubes, cervix, and vagina. The uterus has a muscular outer layer called the myometrium and an inner lining called...

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Hereditary Nonpolyposis Colorectal Cancer

The lifetime risk of endometrial cancer for women with hereditary nonpolyposis colorectal cancer (HNPCC) and for women who are at high risk for HNPCC is as high as 60%. These cases are often diagnosed in the fifth decade, 10 to 20 years earlier than sporadic cases. [3,4,5,6,7] Based on limited evidence, it appears that 5-year survival among HNPCC women diagnosed with endometrial cancer is similar to that of nonhereditary cases in the general population.[8] Because the risk of endometrial cancer is so high among these women, international guidelines suggest gynecologic surveillance including annual transvaginal ultrasound with endometrial biopsy for women aged 25 to 35 years.[9,10] The most recent American Cancer Society Cancer Detection Guidelines (updated January 2005) recommend annual screening with endometrial biopsy beginning at age 35 years.[11]

Tamoxifen-Treated Women

The risk of endometrial cancer is increased in women who are treated with tamoxifen and is even greater in the subset of women who have a history of prior estrogen therapy.[12] Beyond a routine gynecologic examination eliciting any history of abnormal bleeding, it has been recommended that screening studies and procedures for detecting endometrial pathology in women taking tamoxifen should be left to the discretion of the individual gynecologist.[13] Commonly, there are endometrial abnormalities in women taking tamoxifen, especially in false-positive endovaginal ultrasound screening tests. More importantly, any abnormal uterine bleeding should be completely evaluated.

Endometrial cancers that occur in tamoxifen-treated women are very similar to those cancers occurring in the general population, with respect to stage, grade, and histology.[14,15,16] Prognosis is good and not affected by early detection.[17]

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