Cervical Cancer (Cancer of the Cervix) Causes, Stages, Symptoms, Treatment and Prognosis on MedicineNet.com

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Cervical Cancer
(Cancer of the Cervix)

Who Should Get the HPV Vaccine?

Medical Author: Melissa Conrad Stöppler, MD
Medical Editor: William C. Shiel Jr., MD, FACP, FACR

Get the facts on the HPV virus and the cervical cancer vaccine. Human papillomavirus (HPV) infection of the cervix can lead to cervical cancer. A vaccine designed to prevent cervical cancer and other diseases caused by infection with HPVs was approved for use in the U.S. in June 2006. This is the first vaccine to be developed against a known risk factor for the development of a cancer.

While some HPV types infect the skin and cause benign warts and other lesions, about 40 types of HPVs can infect the genital tract. Genital HPV infection is very common in the general population; estimates suggest that up to 50% of all sexually active people will be infected at some point in their lives. In the majority of cases, the infection does not cause any symptoms, but in some women, HPV infection can progress to cause precancerous and cancerous lesions of the uterine cervix. HPVs that infect the genital area are also associated with other less common genital cancers in men and women such as cancers of the anus, vagina, penis, and vulva. HPV infection also causes genital warts in men and women.

The most common HPV types that infect the genital area are HPV types 6, 11, 16, and 18. Among these, HPV types 6 and 11 are most commonly associated with benign lesions, such as genital warts and mild precancerous changes of the cervix. In contrast, HPV types 16 and 18 are the types found in the majority of cancers as well as in severe precancerous changes of the cervix. The vaccine, called Gardasil, targets these four common HPV types.

Learn who should get the HPV vaccine »

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What is the cervix?

The cervix is part of a woman's reproductive system. It's in the pelvis. The cervix is the lower, narrow part of the uterus (womb).

The cervix is a passageway:

The cervix connects the uterus to the vagina. During a menstrual period, blood flows from the uterus through the cervix into the vagina. The vagina leads to the outside of the body.

The cervix makes mucus. During sex, mucus helps sperm move from the vagina through the cervix into the uterus.

During pregnancy, the cervix is tightly closed to help keep the baby inside the uterus. During childbirth, the cervix opens to allow the baby to pass through the vagina.

What is cancer?

Cancer begins in cells, the building blocks that make up tissues. Tissues make up the organs of the body.

Normal cells grow and divide to form new cells as the body needs them. When normal cells grow old or get damaged, they die, and new cells take their place.

Sometimes, this process goes wrong. New cells form when the body does not need them, and old or damaged cells do not die as they should. The buildup of extra cells often forms a mass of tissue called a growth or tumor.

Growths on the cervix can be benign or malignant. Benign growths are not cancer. They are not as harmful as malignant growths (cancer).

Benign growths (polyps, cysts, or genital warts):

are rarely a threat to life

don't invade the tissues around them

Malignant growths (cervical cancer):

may sometimes be a threat to life

can invade nearby tissues and organs

can spread to other parts of the body

Cervical cancer begins in cells on the surface of the cervix. Over time, the cervical cancer can invade more deeply into the cervix and nearby tissues. The cancer cells can spread by breaking away from the original (primary) tumor. They enter blood vessels or lymph vessels, which branch into all the tissues of the body. The cancer cells may attach to other tissues and grow to form new tumors that may damage those tissues. The spread of cancer is called metastasis. See the Staging section for information about cervical cancer that has spread.