Precancerous Conditions and Cancer of the Cervix Over the years, doctors have used different terms to refer to abnormal changes in the cells on the surface of the cervix. One term now used is squamous intraepithelial lesion (SIL). (The word lesion refers to an area of abnormal tissue; intraepithelial means that the abnormal cells are present only in the surface layer of cells.) Changes in these cells can be divided into two categories: Low-grade SIL refers to early changes in the size, shape, and number of cells that form the surface of the cervix. Some low-grade lesions go away on their own. However, with time, others may grow larger or become more abnormal, forming a high-grade lesion. Precancerous low-grade lesions also may be called mild dysplasia or cervical intraepithelial neoplasia 1 (CIN 1). Such early changes in the cervix most often occur in women between the ages of 25 and 35 but can appear in other age groups as well. High-grade SIL means there are a large number of precancerous cells; they look very different from normal cells. Like low-grade SIL, these precancerous changes involve only cells on the surface of the cervix. The cells will not become cancerous and invade deeper layers of the cervix for many months, perhaps years. High-grade lesions also may be called moderate or severe dysplasia, CIN 2 or 3, or carcinoma in situ. They develop most often in women between the ages of 30 and 40 but can occur at other ages as well. Cause and Prevention If abnormal cells spread deeper into the cervix or to other tissues or organs, the disease is then called cervical cancer, or invasive cervical cancer. It occurs most often in women over the age of 40. By studying large numbers of women all over the world, researchers have identified certain risk factors that increase the chance that cells in the cervix will become abnormal or cancerous. They believe that, in many cases, cervical cancer develops when two or more risk factors act together. Research has shown that women who began having sexual intercourse before age 18 and women who have had many sexual partners have an increased risk of developing cervical cancer. Women also are at increased risk if their partners began having sexual intercourse at a young age, have had many sexual partners, or were previously married to women who had cervical cancer. Scientists do not know exactly why the sexual practices of women and their partners affect the risk of developing cervical cancer. However, research suggests that some sexually transmitted viruses can cause cells in the cervix to begin the series of changes that can lead to cancer. Women who have had many sexual partners or whose partners have had many sexual partners may have an increased risk for cervical cancer at least in part because they are more likely to get a sexually transmitted virus. Scientists are studying the effects of sexually transmitted human papillomaviruses (HPVs). Some sexually transmitted HPVs cause genital warts (condylomata acuminata). In addition, scientists believe that some of these viruses may cause the growth of abnormal cells in the cervix and may play a role in cancer development. They have found that women who have HPV or whose partners have HPV have a higher-than-average risk of developing cervical cancer. However, most women who are infected with HPV do not develop cervical cancer, and the virus is not present in all women who have this disease. For these reasons, scientists believe that other factors act together with HPVs. For example, the genital herpes virus also may play a role. Further research is needed to learn the exact role of these viruses and how they act together with other factors in the development of cervical cancer. Smoking also increases the risk of cancer of the cervix, although it is not clear exactly how or why. The risk appears to increase with the number of cigarettes a woman smokes each day and with the number of years she has smoked. Women whose mothers were given the drug diethylstilbestrol (DES) during pregnancy to prevent miscarriage also are at increased risk. (This drug was used for this purpose from about 1940 to 1970.) A rare type of vaginal and cervical cancer has been found in a small number of women whose mothers used DES. Several reports suggest that women whose immune systems are weakened are more likely than others to develop cervical cancer. For example, women who have the human immunodeficiency virus (HIV), which causes AIDS, are at increased risk. Also, organ transplant patients, who receive drugs that suppress the immune system to prevent rejection of the new organ, are more likely than others to develop precancerous lesions. Some researchers believe that there is an increased risk of cervical cancer in women who use oral contraceptives (the pill). However, scientists have not found that the pill directly causes cancer of the cervix. This relationship is hard to prove because the two main risk factors for cervical cancer -- intercourse at an early age and multiple sex partners -- may be more common among women who use the pill than among those who do not. Still, oral contraceptive labels warn of this possible risk and advise women who use them to have yearly Pap tests. Some research has shown that vitamin A may play a role in stopping or preventing cancerous changes in cells like those on the surface of the cervix. Further research with forms of vitamin A may help scientists learn more about preventing cancer of the cervix. At present, early detection and treatment of precancerous tissue remain the most effective ways of preventing cervical cancer. Information about early detection appears in the Early Detection section. Women should talk with their doctors about an appropriate schedule of checkups. The doctor's advice will be based on such factors as the women's age, medical history, and risk factors. Early Detection In a pelvic exam, the doctor checks the uterus, vagina, ovaries, fallopian tubes, bladder, and rectum. The doctor feels these organs for any abnormality in their shape or size. A speculum is used to widen the vagina so that the doctor can see the upper part of the vagina and the cervix. The Pap test is a simple, painless test to detect abnormal cells in and around the cervix. A woman should have this test when she is not menstruating; the best time is between 10 and 20 days after the first day of her menstrual period. For about 2 days before a Pap test, she should avoid douching or using spermicidal foams, creams, or jellies or vaginal medicines (except as directed by a physician), which may wash away or hide any abnormal cells. A Pap test can be done in a doctor's office or a health clinic. A wooden scraper (spatula) and/or a small brush is used to collect a sample of cells from the cervix and upper vagina. The cells are placed on a glass slide and sent to a medical laboratory to be checked for abnormal changes. The way of describing Pap test results is changing. The newest method is the Bethesda System. Changes are described as low-grade or high-grade SIL. Many doctors believe that the Bethesda System provides more useful information than an older system, which uses numbers ranging from class 1 to class 5. (In class 1, the cells in the sample are normal, while class 5 refers to invasive cancer.) Women should ask their doctor to explain the system used for their Pap test. Women should have regular checkups, including a pelvic exam and a Pap test, if they are or have been sexually active or if they are age 18 or older. Those who are at increased risk of developing cancer of the cervix should be especially careful to follow their doctor's advice about checkups. (For a discussion of risk factors for cervical cancer see the Cause and Prevention section.) Women who have had a hysterectomy (surgery to remove the uterus, including the cervix) should ask their doctor's advice about having pelvic exams and Pap tests. Symptoms Symptoms usually do not appear until abnormal cervical cells become cancerous and invade nearby tissue. When this happens, the most common symptom is abnormal bleeding. Bleeding may start and stop between regular menstrual periods, or it may occur after sexual intercourse, douching, or a pelvic exam. Menstrual bleeding may last longer and be heavier than usual. Bleeding after menopause also may be a symptom of cervical cancer. Increased vaginal discharge is another symptom of cervical cancer. These symptoms may be caused by cancer or by other health problems. Only a doctor can tell for sure. It is important for a woman to see her doctor if she is having any of these symptoms. Diagnosis Colposcopy is a widely used method to check the cervix for abnormal areas. The doctor applies a vinegar-like solution to the cervix and then uses an instrument much like a microscope (called a colposcope) to look closely at the cervix. The doctor may then coat the cervix with an iodine solution (a procedure called the Schiller test). Healthy cells turn brown; abnormal cells turn white or yellow. These procedures may be done in the doctor's office. The doctor may remove a small amount of cervical tissue for examination by a pathologist. This procedure is called a biopsy. In one type of biopsy, the doctor uses an instrument to pinch off small pieces of cervical tissue. Another method used to do a biopsy is called loop electrosurgical excision procedure (LEEP). In this procedure, the doctor uses an electric wire loop to slice off a thin, round piece of tissue. These types of biopsies may be done in the doctor's office using local anesthesia. The doctor also may want to check inside the opening of the cervix, an area that cannot be seen during colposcopy. In a procedure called endocervical curettage (ECC), the doctor uses a curette (a small, spoon-shaped instrument) to scrape tissue from inside the cervical opening. These procedures for removing tissue may cause some bleeding or other discharge. However, healing usually occurs quickly. Women also often experience some pain similar to menstrual cramping, which can be relieved with medicine. These tests may not show for sure whether the abnormal cells are present only on the surface of the cervix. In that case, the doctor will then remove a larger, cone-shaped sample of tissue. This procedure, called conization or cone biopsy, allows the pathologist to see whether the abnormal cells have invaded tissue beneath the surface of the cervix. Conization also may be used as treatment for a precancerous lesion if the entire abnormal area can be removed. This procedure requires either local or general anesthesia and may be done in the doctor's office or in the hospital. In a few cases, it may not be clear whether an abnormal Pap test or a woman's symptoms are caused by problems in the cervix or in the endometrium (the lining of the uterus). In this situation, the doctor may do dilation and curettage (D and C). The doctor stretches the cervical opening and uses a curette to scrape tissue from the lining of the uterus as well as from the cervical canal. Like conization, this procedure requires local or general anesthesia and may be done in the doctor's office or in the hospital. Treating Precancerous Conditions In some cases, a woman may have a hysterectomy, particularly if abnormal cells are found inside the opening of the cervix. This surgery is more likely to be done when the woman does not want to have children in the future. Treating Cancer of the Cervix Staging is a careful attempt to find out whether the cancer has spread and, if so, what parts of the body are affected. Blood and urine tests usually are done. The doctor also may do a thorough pelvic exam in the operating room with the patient under anesthesia. During this exam, the doctor may do procedures called cystoscopy and proctosigmoidoscopy. In cystoscopy, the doctor looks inside the bladder with a thin, lighted instrument. Proctosigmoidoscopy is a procedure in which a lighted instrument is used to check the rectum and the lower part of the large intestine. Because cervical cancer may spread to the bladder, rectum, lymph nodes, or lungs, the doctor also may order x-rays or tests to check these areas. For example, the woman may have a series of x-rays of the kidneys and bladder, called an intravenous pyelogram. The doctor also may check the intestines and rectum using a barium enema. To look for lymph nodes that may be enlarged because they contain cancer cells, the doctor may order a CT or CAT scan, a series of x-rays put together by a computer to make detailed pictures of areas inside the body. Other procedures that may be used to check organs inside the body are ultrasonography and MRI. Getting a Second Opinion The woman's doctor may be able to suggest pathologists and specialists to consult. Women can get the names of specialists from their local medical society, a nearby hospital, or a medical school. When a person is diagnosed with cancer, shock and stress are natural reactions. These feelings may make it difficult for patients to think of everything they want to ask the doctor. Often it helps to make a list of questions. Also, to help remember what the doctor says, patients may take notes or ask whether they may use a tape recorder. Some people also want to have a family member or friend with them when they talk to the doctor -- to take part in the discussion, to take notes, or just to listen. Patients should not feel they need to ask all their questions or remember all the answers at one time. They will have other chances to ask the doctor to explain things and to get more information. Here are some questions a woman with cervical cancer may want to ask the doctor before her treatment begins:
Methods of Treatment Surgery is local therapy to remove abnormal tissue in or near the cervix. If the cancer is only on the surface of the cervix, the doctor may destroy the cancerous cells in ways similar to the methods used to treat precancerous lesions. If the disease has invaded deeper layers of the cervix but has not spread beyond the cervix, the doctor may perform an operation to remove the tumor but leave the uterus and the ovaries. In other cases, however, a woman may need to have a hysterectomy or may choose to have this surgery, especially if she is not planning to have children in the future. In this procedure, the doctor removes the entire uterus, including the cervix; sometimes the ovaries and fallopian tubes also are removed. In addition, the doctor may remove lymph nodes near the uterus to learn whether the cancer has spread to these organs. Here are some questions a woman may want to ask the doctor before surgery:
Radiation therapy (also called radiotherapy) uses high-energy rays to damage cancer cells and stop them from growing. Like surgery, radiation therapy is local therapy; the radiation can affect cancer cells only in the treated area. The radiation may come from a large machine (external radiation) or from radioactive materials placed directly into the cervix (implant radiation). Some patients receive both types of radiation therapy. A woman receiving external radiation therapy goes to the hospital or clinic each day for treatment. Usually treatments are given 5 days a week for 5 to 6 weeks. At the end of that time, the tumor site very often gets an extra "boost" of radiation. For internal or implant radiation, a capsule containing radioactive material is placed directly in the cervix. The implant puts cancer-killing rays close to the tumor while sparing most of the healthy tissue around it. It is usually left in place for 1 to 3 days, and the treatment may be repeated several times over the course of 1 to 2 weeks. The patient stays in the hospital while the implants are in place. The National Cancer Institute booklet Radiation Therapy and You, contains more information about this form of treatment. Here are some questions a woman may want to ask the doctor before radiation therapy:
Chemotherapy is the use of drugs to kill cancer cells. It is most often used when cervical cancer has spread to other parts of the body. The doctor may use just one drug or a combination of drugs. Anticancer drugs used to treat cervical cancer may be given by injection into a vein or by mouth. Either way, chemotherapy is systemic treatment, meaning that the drugs flow through the body in the bloodstream. Chemotherapy is given in cycles: a treatment period followed by a recovery period, then another treatment period, and so on. Most patients have chemotherapy as an outpatient (at the hospital, at the doctor's office, or at home). Depending on which drugs are given and the woman's general health, however, she may need to stay in the hospital during her treatment. Here are some questions a woman may want to ask the doctor before chemotherapy begins:
Biological therapy is treatment using substances to improve the way the body's immune system fights disease. It may be used to treat cancer that has spread from the cervix to other parts of the body. Interferon is the most common form of biological therapy for this disease; it may be used in combination with chemotherapy. Most patients who receive interferon are treated as outpatients. Clinical Trials Clinical trials of new treatments for cervical cancer are under way. Doctors are studying new types and schedules of radiation therapy. They also are looking for new drugs, drug combinations, and ways to combine various types of treatment. Women with cervical cancer may want to read the National Cancer Institute booklet called Taking Part in Clinical Trials: What Cancer Patients Need To Know, which explains the possible benefits and risks of treatment studies. Those who are interested in taking part in a trial should talk with their doctor. Side Effects of Treatment Surgery Hysterectomy is major surgery. For a few days after the operation, the woman may have pain in her lower abdomen. The doctor can order medicine to control the pain. A woman may have difficulty emptying her bladder and may need to have a catheter inserted into the bladder to drain the urine for a few days after surgery. She also may have trouble having normal bowel movements. For a period of time after the surgery, the woman's activities should be limited to allow healing to take place. Normal activities, including sexual intercourse, usually can be resumed in 4 to 8 weeks. Women who have had their uterus removed no longer have menstrual periods. However, sexual desire and the ability to have intercourse usually are not affected by hysterectomy. On the other hand, many women have an emotionally difficult time after this surgery. A woman's view of her own sexuality may change, and she may feel an emotional loss because she is no longer able to have children. An understanding partner is important at this time. Women may want to discuss these issues with their doctor, nurse, medical social worker, or member of the clergy. They also may find it helpful to read the National Cancer Institute booklet called Taking Time. Radiation Therapy With external radiation, it is common to lose hair in the treated area and for the skin to become red, dry, tender, and itchy. There may be permanent darkening or "bronzing" of the skin in the treated area. This area should be exposed to the air when possible but protected from the sun, and patients should avoid wearing clothes that rub the treated area. Patients will be shown how to keep the area clean. They should not use any lotion or cream on their skin without the doctor's advice. Usually, women are told not to have intercourse during radiation therapy or while an implant is in place. However, most women can have sexual relations within a few weeks after treatment ends. Sometimes, after radiation treatment, the vagina becomes narrower and less flexible, and intercourse may be painful. Patients may be taught how to use a dilator as well as a water-based lubricant to help minimize these problems. Patients who receive external or internal radiation therapy also may have diarrhea and frequent, uncomfortable urination. The doctor can make suggestions or order medicines to control these problems. Chemotherapy Biological Therapy Nutrition for Cancer Patients Eating well during cancer treatment means getting enough calories and protein to help prevent weight loss and regain strength. Patients who eat well often feel better and have more energy. In addition, they may be better able to handle the side effects of treatment. Doctors, nurses, and dietitians can offer advice for healthy eating during cancer treatment. Patients and their families also may want to read the National Cancer Institute booklet Eating Hints for Cancer Patients, which contains many useful suggestions. Follow-up Care Cancer treatment may cause side effects many years later. For this reason, patients should continue to have regular checkups and should report any health problems that appear. Support for Cancer Patients Cancer patients may worry about holding their job, caring for their family, keeping up with daily activities, or starting a new relationship. Worries about tests, treatments, hospital stays, and medical bills are common. Doctors, nurses, and other members of the health care team can answer questions about treatment, working, or other activities. Also, meeting with a social worker, counselor, or member of the clergy can be helpful to patients who want to talk about their feelings or discuss their concerns. Friends and relatives can be very supportive. Also, it helps many patients to discuss their concerns with others who have cancer. Cancer patients often get together in support groups, where they can share what they have learned about coping with cancer and the effects of treatment. It is important to keep in mind, however, that each patient is different. Treatments and ways of dealing with cancer that work for one person may not be right for another -- even if they both have the same kind of cancer. It is always a good idea to discuss the advice of friends and family members with the doctor. Often, a social worker at the hospital or clinic can suggest groups that can help with rehabilitation, emotional support, financial aid, transportation, or home care. For example, the American Cancer Society has many services for patients and their families. They also offer many free booklets, including one on sexuality and cancer. Local offices of the American Cancer Society are listed in the white pages of the telephone directory. What the Future Holds Patients and their families are naturally concerned about what the future holds. Sometimes patients use statistics to try to figure out their chances of being cured. It is important to remember, however, that statistics are averages based on large numbers of patients. They cannot be used to predict what will happen to a particular woman because no two patients are alike; treatments and responses vary greatly. The doctor who takes care of the patient and knows her medical history is in the best position to talk with her about her chance of recovery (prognosis). Doctors often talk about surviving cancer, or they may use the term remission rather than cure. Although many women with cervical cancer recover completely, doctors use these terms because the disease can recur. (The return of cancer is called a recurrence.) |
Every month, during the menstrual cycle, an egg is released from one ovary in a process called ovulation. The egg travels from the ovary through the fallopian tube to the uterus. The ovaries are also the main source of the female hormones estrogen and progesterone. These hormones influence the development of a woman's breasts, body shape, and body hair. They also regulate the menstrual cycle and pregnancy. Ovarian cancer cells can break away from the ovary and spread to other tissues and organs in a process called shedding. When ovarian cancer sheds, it tends to seed (form new tumors) on the peritoneum (the large membrane that lines the abdomen) and on the diaphragm (the thin muscle that separates the chest from the abdomen). Fluid may collect in the abdomen. This condition is known as ascites. It may make a woman feel bloated, or her abdomen may look swollen. Ovarian cancer cells can also enter the bloodstream or lymphatic system (the tissues and organs that produce and store cells that fight infection and disease). Once in the bloodstream or lymphatic system, the cancer cells can travel and form new tumors in other parts of the body. Who's at Risk?
As we learn more about what causes ovarian cancer, we may also learn how to reduce the chance of getting this disease. Some studies have shown that breast feeding and taking birth control pills (oral contraceptives) may decrease a woman's likelihood of developing ovarian cancer. These factors decrease the number of times a woman ovulates, and studies suggest that reducing the number of ovulations during a woman's lifetime may lower the risk of ovarian cancer. Women who have had an operation that prevents pregnancy (tubal ligation) or have had their uterus and cervix removed (hysterectomy) also have a lower risk of developing ovarian cancer. In addition, some evidence suggests that reducing the amount of fat in the diet may lower the risk of developing ovarian cancer. Women who are at high risk for ovarian cancer due to a family history of the disease may consider having their ovaries removed before cancer develops (prophylactic oophorectomy). This procedure usually, but not always, protects women from developing ovarian cancer. The risks associated with this surgery and its side effects should be carefully considered. A woman should discuss the possible benefits and risks with her doctor based on her unique situation. Having one or more of the risk factors mentioned here does not mean that a woman is sure to develop ovarian cancer, but the chance may be higher than average. Women who are concerned about ovarian cancer may want to talk with a doctor who specializes in treating women with cancer: a gynecologist, a gynecologic oncologist, or a medical oncologist. The doctor may be able to suggest ways to reduce the likelihood of developing ovarian cancer and can plan an appropriate schedule for checkups. Recognizing Symptoms
These symptoms may be caused by ovarian cancer or by other, less serious conditions. It is important to check with a doctor about any of these symptoms. To help find the cause of symptoms, a doctor evaluates a woman's medical history. The doctor also performs a physical exam and orders diagnostic tests. Some exams and tests that may be useful are described below:
If the diagnosis is ovarian cancer, the doctor will want to learn the stage (or extent) of disease. Staging is a careful attempt to find out whether the cancer has spread and, if so, to what parts of the body. Staging may involve surgery, x-rays and other imaging procedures, and lab tests. Knowing the stage of the disease helps the doctor plan treatment. Detecting Ovarian Cancer Treatment for Ovarian Cancer
Possible Side Effects of Treatment Surgery causes short-term pain and tenderness in the area of the operation. Discomfort or pain after surgery can be controlled with medicine. Patients should feel free to discuss pain relief with their doctor. For several days after surgery, the patient may have difficulty emptying her bladder and having bowel movements. When both ovaries are removed, a woman loses her ability to become pregnant. Some women may experience feelings of loss that may make intimacy difficult. Counseling or support for both the patient and her partner may be helpful. Also, removing the ovaries means that the body's natural source of estrogen and progesterone is lost, and menopause occurs. Symptoms of menopause, such as hot flashes and vaginal dryness, are likely to appear soon after the surgery. Some form of hormone replacement therapy may be used to ease such symptoms. Deciding whether to use it is a personal choice; women with ovarian cancer should discuss with their doctors the possible risks and benefits of using hormone replacement therapy. Chemotherapy affects normal as well as cancerous cells. Side effects depend largely on the specific drugs and the dose (amount of drug given). Common side effects of chemotherapy include nausea and vomiting, loss of appetite, diarrhea, fatigue, numbness and tingling in hands or feet, headaches, hair loss, and darkening of the skin and fingernails. Certain drugs used in the treatment of ovarian cancer can cause some hearing loss or kidney damage. To help protect the kidneys while taking these drugs, patients may receive extra fluid intravenously. Radiation therapy, like chemotherapy, affects normal as well as cancerous cells. Side effects of radiation therapy depend mainly on the treatment dose and the part of the body that is treated. Common side effects of radiation therapy to the abdomen are fatigue, loss of appetite, nausea, vomiting, urinary discomfort, diarrhea, and skin changes on the abdomen. Intraperitoneal radiation therapy may cause abdominal pain and bowel obstruction (a blockage of the intestine). The Importance of Follow up Care In addition to having follow up exams to check for the return of ovarian cancer, patients may also want to ask their doctor about checking them for other types of cancer. Women who have had ovarian cancer may be at increased risk of developing breast or colon cancer. In addition, treatment with certain anticancer drugs may increase the risk of second cancers, such as leukemia. Emotional Support In fact, attention to the emotional burden of having cancer is often a part of a patient's treatment plan. The support of the health care team (doctors, nurses, social workers), support groups, and patient-to-patient networks can help people feel less isolated and distressed and can improve the quality of their lives. Cancer support groups provide an environment where cancer patients can talk about living with cancer with others who may be having similar experiences. Patients may want to speak with their health care team about finding a support group. Questions for Your Doctor Diagnosis
Treatment
Side Effects
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The Health Care Team
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