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Cervical Cancer Health Center

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Cervical Cancer

Cervical Cancer Overview

The uterine cervix is the lowest portion of a woman's uterus (womb), connecting the uterus with the vagina.

Cervical cancer occurs when the cells of the cervix grow abnormally and invade other tissues and organs of the body. When it is invasive, this cancer affects the deeper tissues of the cervix and may have spread to other parts of the body (metastasis), most notably the lungs, liver, bladder, vagina, and rectum.

However, cervical cancer is slow-growing, so its progression through precancerous changes provides opportunities for prevention, early detection, and treatment. Better means of detection have meant a decline in cervical cancer in the U.S. over the decades.

Most women diagnosed with precancerous changes in the cervix are in their 20s and 30s, but the average age of women when they are diagnosed with cervical cancer is the mid 50s. This difference in the age at which precancerous changes are most frequently diagnosed and the age at which cancer is diagnosed highlights the slow progression of this disease and the reason why it can be prevented if adequate steps are taken.

Causes of Cervical Cancer

Cervical cancer begins with abnormal changes in the cervical tissue. The risk of developing these abnormal changes is associated with infection with human papillomavirus (HPV). In addition, early sexual contact, multiple sexual partners, and taking oral contraceptives (birth control pills) increase the risk of cervical cancer, because they increase exposure to HPV. Cigarette smoking (nicotine) increases the growth rate of HPV.

Forms of HPV, a virus whose different types cause skin warts, genital warts, and other abnormal skin disorders, have been shown to lead to many of the changes in cervical cells that may eventually lead to cancer. Genetic material that comes from certain forms of HPV (high-risk subtypes) has been found in cervical tissues that show cancerous or precancerous changes.

In addition, women who have been diagnosed with HPV are more likely to develop a cervical cancer. Girls who begin sexual activity before age 16 or within a year of starting their menstrual periods are at high risk of developing cervical cancer.

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