Cervical cancer is a disease in which malignant (cancer) cells form in the tissues of the cervix.
The cervix is the lower, narrow end of the uterus (the hollow, pear-shaped organ where a fetus grows). The cervix leads from 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 the endometrium.
Cervical cancer usually develops slowly over time. Before cancer appears in the cervix, the cells of the cervix go through changes known as dysplasia, in which abnormal cells begin to appear in the cervical tissue. Over time, the abnormal cells may become cancer cells and start to grow and spread more deeply into the cervix and to surrounding areas.
Cervical cancer in children is rare. For more information, see the PDQ summary on Unusual Cancers of Childhood.
Human papillomavirus (HPV) infection is the major risk factor for cervical cancer.
Anything that increases your risk of getting a disease is called a risk factor. Having a risk factor does not mean that you will get cancer; not having risk factors doesn't mean that you will not get cancer. Talk with your doctor if you think you may be at risk.
Infection of the cervix with human papillomavirus (HPV) is almost always the cause of cervical cancer. Not all women with HPV infection, however, will develop cervical cancer. Women who do not regularly have tests to detect HPV or abnormal cells in the cervix are at increased risk of cervical cancer. There are two vaccines to prevent HPV in girls and young women who do not have HPV. For more information, see the PDQ summary on Cervical Cancer Prevention.
Other possible risk factors include the following:
There are usually no signs or symptoms of early cervical cancer but it can be detected early with regular check-ups.