Surgery-Related Factors
        Breast Cancer
        Colorectal Cancer
        Prostate Cancer
        Other Pelvic Tumors
Chemotherapy-Related Factors
Radiation Therapy-Related Factors
Hormone Therapy-Related Factors
Psychological Factors

Both physical and psychological factors contribute to the development of sexual dysfunction. Physical factors include loss of function due to the effects of cancer therapies, fatigue, and pain. Surgery, chemotherapy, and radiation therapy may have a direct physical impact on sexual function. Other factors that may contribute to sexual dysfunction include pain medications, depression, feelings of guilt from misbeliefs about the origin of the cancer, changes in body image after surgery, and stresses due to personal relationships. Getting older is often associated with a decrease in sexual desire and performance, however, sex may be important to the older person's quality of life and the loss of sexual function can be distressing.

Surgery can directly affect sexual function. Factors that help predict a patient's sexual function after surgery include age, sexual and bladder function before surgery, tumor location and size, and how much tissue was removed during surgery. Surgeries that affect sexual function include breast cancer, colorectal cancer, prostate cancer, and other pelvic tumors.

Sexual function after breast cancer surgery has been the subject of much research. Surgery to save or reconstruct the breast appears to have little effect on sexual function compared with surgery to remove the whole breast. Women who have surgery to save the breast are more likely to continue to enjoy breast caressing, but there is no difference in areas such as how often women have sex, the ease of reaching orgasm, or overall sexual satisfaction. Having a mastectomy, however, has been linked to a loss of interest in sex. Chemotherapy has been linked to problems with sexual function.

Sexual and bladder dysfunctions are common complications of surgery for rectal cancer. The main cause of problems with erection, ejaculation, and orgasm is injury to nerves in the pelvic cavity. Nerves can be damaged when their blood supply is disrupted or when the nerves are cut.

Newer nerve-sparing techniques for radical prostatectomy are being debated as a more successful approach for preserving erectile function than radiation therapy for prostate cancer. Long-term follow-up is needed to compare the effects of surgery with the effects of radiation therapy. Recovery of erectile function usually occurs within a year after having a radical prostatectomy. The effects of radiation therapy on erectile function are very slow and gradual occurring for two or three years after treatment. The cause of loss of erectile function differs between surgery and radiation therapy. Radical prostatectomy damages nerves that make blood vessels open wider to allow more blood into the penis. Eventually the tissue does not get enough oxygen, cells die, and scar tissue forms that interferes with erectile function. Radiation therapy appears to damage the arteries that bring blood to the penis.

Brachytherapy (internal radiation therapy using radioactive implants) is being used more often to treat prostate cancer. With brachytherapy alone, ejaculation and erectile function are better preserved than when external radiation and/or hormone therapy are added. Radiation damage to nerves and blood vessels may occur with brachytherapy, and higher doses of radiation may cause more damage.

Men who have surgery to remove the bladder, colon, and/or rectum may improve recovery of erectile function if nerve-sparing surgical techniques are used. The sexual side effects of radiation therapy for pelvic tumors are similar to those after prostate cancer treatment.

Women who have surgery to remove the uterus, ovaries, bladder, or other organs in the abdomen or pelvis may experience pain and loss of sexual function depending on the amount of tissue/organ removed. With counseling and other medical treatments, these patients may regain normal sensation in the vagina and genital areas and be able to have pain-free intercourse and reach orgasm.

Chemotherapy is associated with a loss of desire and decreased frequency of intercourse for both men and women. The common side effects of chemotherapy such as nausea, vomiting, diarrhea, constipation, mucositis, weight loss or gain, and loss of hair can affect an individual's sexual self-image and make him or her feel unattractive.

For women, chemotherapy may cause vaginal dryness, pain with intercourse, and decreased ability to reach orgasm. In older women, chemotherapy may increase the risk of ovarian cancer. Chemotherapy may also cause a sudden loss of estrogen production from the ovaries. The loss of estrogen can cause shrinking, thinning, and loss of elasticity of the vagina, vaginal dryness, hot flashes, urinary tract infections, mood swings, fatigue, and irritability. Young women who have breast cancer and have had surgeries such as removal of one or both ovaries, may experience symptoms related to loss of estrogen. These women experience high rates of sexual problems since there is a concern that estrogen replacement therapy, which may decrease these symptoms, could cause the breast cancer to return. For women with other types of cancer, however, estrogen replacement therapy can usually resolve many sexual problems. Also, women who have graft-versus-host disease (a reaction of donated bone marrow or peripheral stem cells against a person's tissue) following bone marrow transplantation may develop scar tissue and narrowing of the vagina that can interfere with intercourse.

For men, sexual problems such as loss of desire and erectile dysfunction are more common after a bone marrow transplant because of graft-versus-host disease or nerve damage. Occasionally chemotherapy may interfere with testosterone production in the testicles. Testosterone replacement may be necessary to regain sexual function.

Like chemotherapy, radiation therapy can cause side effects such as fatigue, nausea and vomiting, diarrhea, and other symptoms that can decrease feelings of sexuality. In women, radiation therapy to the pelvis can cause changes in the lining of the vagina. These changes eventually cause a narrowing of the vagina and formation of scar tissue that results in pain with intercourse, infertility and other long term sexual problems. Women should discuss concerns about these side effects with their doctor and ask about the use of a vaginal dilator.

For men, radiation therapy can cause problems with getting and keeping an erection. The exact cause of sexual problems after radiation therapy is unknown. Possible causes are nerve injury, a blockage of blood supply to the penis, or decreased levels of testosterone. Sexual changes occur very slowly over a period of six months to one year after radiation therapy. Men who had problems with erectile dysfunction before getting cancer have a greater risk of developing sexual problems after cancer diagnosis and treatment. Other risk factors that can contribute to a greater risk of sexual problems in men are cigarette smoking, history of heart disease, high blood pressure, and diabetes.

Hormone therapy for prostate cancer can decrease normal hormone levels and cause a decrease in sexual desire, erectile dysfunction, and problems reaching orgasm. Younger men do not always experience the same degree of sexual dysfunction. Some treatment centers are experimenting with delayed or intermittent hormone therapy to prevent sexual problems. It is not yet known if these modified treatments affect the long-term survival of younger men.

In a large study of women with breast cancer who were treated with adjuvant hormone therapy, patients who took exemestane, a type of aromatase inhibitor, had fewer hot flashes and less vaginal discharge than those who took tamoxifen. However, patients who took exemestane had more vaginal dryness, bone pain, and sleep disorders than patients who took tamoxifen.

Patients recovering from cancer often have anxiety or guilt that previous sexual activities may have caused their cancer. Some patients believe that sexual activity may cause the cancer to return or pass the cancer to their partner. Discussing their feelings and concerns with a health care professional is important for patients. Misbeliefs can be corrected and patients can be reassured that cancer is not passed on through sexual contact.

Loss of sexual desire and a decrease in sexual pleasure are common symptoms of depression. Depression is more common in patients with cancer than in the general healthy population. It is important that patients discuss their feelings with their doctor. Getting treatment for depression may be helpful in relieving sexual problems. (Refer to the PDQ summary on Depression ¹ for more information.)

Cancer treatments may cause physical changes that affect how an individual sees his or her physical appearance. This view can make a man or woman feel sexually unattractive. It is important that patients discuss these feelings and concerns with a health care professional. Patients can learn how to deal effectively with these problems.

The stress of being diagnosed with cancer and undergoing treatment for cancer can make existing problems in relationships even worse. The sexual relationship can also be affected. Patients who do not have a committed relationship may stop dating because they fear being rejected by a potential new partner who learns about their history of cancer. One of the most important factors in adjusting after cancer treatment is the patient's feeling about his or her sexuality before being diagnosed with cancer. If patients had positive feelings about sexuality, they may be more likely to resume sexual activity after treatment for cancer.

Glossary Terms

The area of the body that contains the pancreas, stomach, intestines, liver, gallbladder, and other organs.

Treatment given after the primary treatment to increase the chances of a cure. Adjuvant therapy may include chemotherapy, radiation therapy, hormone therapy, or biological therapy.

Feelings of fear, dread, and uneasiness that may occur as a reaction to stress. A person with anxiety may sweat, feel restless and tense, and have a rapid heart beat. Extreme anxiety that happens often over time may be a sign of an anxiety disorder.

A drug that prevents the formation of estradiol, a female hormone, by interfering with an aromatase enzyme. Aromatase inhibitors are used as a type of hormone therapy for postmenopausal women who have hormone-dependent breast cancer.

A blood vessel that carries blood from the heart to tissues and organs in the body.

The organ that stores urine.

A tissue with red blood cells, white blood cells, platelets, and other substances suspended in fluid called plasma. Blood takes oxygen and nutrients to the tissues, and carries away wastes.

A tube through which the blood circulates in the body. Blood vessels include a network of arteries, arterioles, capillaries, venules, and veins.

The way a person thinks about his or her body and how it looks to others.

The soft, sponge-like tissue in the center of most bones. It produces white blood cells, red blood cells, and platelets.

A procedure to replace bone marrow that has been destroyed by treatment with high doses of anticancer drugs or radiation. Transplantation may be autologous (an individual's own marrow saved before treatment), allogeneic (marrow donated by someone else), or syngeneic (marrow donated by an identical twin).

A type of radiation therapy in which radioactive material sealed in needles, seeds, wires, or catheters is placed directly into or near a tumor. Also called implant radiation therapy, internal radiation therapy, and radiation brachytherapy.

Glandular organ located on the chest. The breast is made up of connective tissue, fat, and breast tissue that contains the glands that can make milk. Also called mammary gland.

Cancer that forms in tissues of the breast, usually the ducts (tubes that carry milk to the nipple) and lobules (glands that make milk). It occurs in both men and women, although male breast cancer is rare.

Surgery to rebuild the shape of the breast after a mastectomy.

An operation to remove the breast cancer but not the breast itself. Types of breast-sparing surgery include lumpectomy (removal of the lump), quadrantectomy (removal of one quarter, or quadrant, of the breast), and segmental mastectomy (removal of the cancer as well as some of the breast tissue around the tumor and the lining over the chest muscles below the tumor). Also called breast-conserving surgery.

A term for diseases in which abnormal cells divide without control and can invade nearby tissues. Cancer cells can also spread to other parts of the body through the blood and lymph systems. There are several main types of cancer. Carcinoma is cancer that begins in the skin or in tissues that line or cover internal organs. Sarcoma is cancer that begins in bone, cartilage, fat, muscle, blood vessels, or other connective or supportive tissue. Leukemia is cancer that starts in blood-forming tissue such as the bone marrow, and causes large numbers of abnormal blood cells to be produced and enter the blood. Lymphoma and multiple myeloma are cancers that begin in the cells of the immune system. Central nervous system cancers are cancers that begin in the tissues of the brain and spinal cord.

A hollow area or hole. It may describe a body cavity (such as the space within the abdomen) or a hole in a tooth caused by decay.

The individual unit that makes up the tissues of the body. All living things are made up of one or more cells.

Treatment with drugs that kill cancer cells.

The longest part of the large intestine, which is a tube-like organ connected to the small intestine at one end and the anus at the other. The colon removes water and some nutrients and electrolytes from partially digested food. The remaining material, solid waste called stool, moves through the colon to the rectum and leaves the body through the anus.

Cancer that develops in the colon (the longest part of the large intestine) and/or the rectum (the last several inches of the large intestine before the anus).

In medicine, a medical problem that occurs during a disease, or after a procedure or treatment. The complication may be caused by the disease, procedure, or treatment or may be unrelated to them.

A condition in which stool becomes hard, dry, and difficult to pass, and bowel movements don’t happen very often. Other symptoms may include painful bowel movements, and feeling bloated, uncomfortable, and sluggish.

The process by which a professional counselor helps a person cope with mental or emotional distress, and understand and solve personal problems.

A mental condition marked by ongoing feelings of sadness, despair, loss of energy, and difficulty dealing with normal daily life. Other symptoms of depression include feelings of worthlessness and hopelessness, loss of pleasure in activities, changes in eating or sleeping habits, and thoughts of death or suicide. Depression can affect anyone, and can be successfully treated. Depression affects 15-25% of cancer patients.

Any of several diseases in which the kidneys make a large amount of urine. Diabetes usually refers to diabetes mellitus in which there is also a high level of glucose (a type of sugar) in the blood because the body does not make enough insulin or use it the way it should.

The process of identifying a disease, such as cancer, from its signs and symptoms.

Frequent and watery bowel movements.

A device used to stretch or enlarge an opening.

In medicine, a fluid that comes out of the body. Discharge can be normal or a sign of disease. Discharge also means release of a patient from care.

Extreme mental or physical pain or suffering.

The amount of medicine taken, or radiation given, at one time.

A state of not functioning normally.

The release of semen through the penis during orgasm.

An inability to have an erection of the penis adequate for sexual intercourse. Also called impotence.

In medicine, the swelling of the penis with blood, causing it to become firm.

A type of hormone made by the body that helps develop and maintain female sex characteristics and the growth of long bones. Estrogens can also be made in the laboratory. They may be used as a type of birth control and to treat symptoms of menopause, menstrual disorders, osteoporosis, and other conditions.

Hormones (estrogen, progesterone, or both) given to postmenopausal women or to women who have had their ovaries surgically removed. Hormones are given to replace the estrogen no longer produced by the ovaries. Also called ERT.

A drug used to treat advanced breast cancer and to prevent recurrent breast cancer in postmenopausal women who have already been treated with tamoxifen. It is also being studied in the treatment of other types of cancer. Exemestane causes a decrease in the amount of estrogen made by the body. It is a type of aromatase inhibitor. Also called Aromasin.

A type of radiation therapy that uses a machine to aim high-energy rays at the cancer from outside of the body. Also called external-beam radiation therapy.

A condition marked by extreme tiredness and inability to function due lack of energy. Fatigue may be acute or chronic.

Monitoring a person's health over time after treatment. This includes keeping track of the health of people who participate in a clinical study or clinical trial for a period of time, both during the study and after the study ends.

Refers to the genitalia (external and internal sex organs and glands).

A disease caused when cells from a donated stem cell graft attack the normal tissue of the transplant patient. Symptoms include jaundice, skin rash or blisters, a dry mouth, or dry eyes. Also called GVHD.

Treatment that adds, blocks, or removes hormones. For certain conditions (such as diabetes or menopause), hormones are given to adjust low hormone levels. To slow or stop the growth of certain cancers (such as prostate and breast cancer), synthetic hormones or other drugs may be given to block the body’s natural hormones. Sometimes surgery is needed to remove the gland that makes a certain hormone. Also called endocrine therapy, hormonal therapy, and hormone treatment.

A sudden, temporary onset of body warmth, flushing, and sweating (often associated with menopause).

A substance or object that is put in the body as a prosthesis, or for treatment or diagnosis.

Invasion and multiplication of germs in the body. Infections can occur in any part of the body and can spread throughout the body. The germs may be bacteria, viruses, yeast, or fungi. They can cause a fever and other problems, depending on where the infection occurs. When the body’s natural defense system is strong, it can often fight the germs and prevent infection. Some cancer treatments can weaken the natural defense system.

The inability to produce children.

Surgery to remove the breast (or as much of the breast tissue as possible).

A legal drug that is used to prevent, treat, or relieve symptoms of a disease or abnormal condition.

A complication of some cancer therapies in which the lining of the digestive system becomes inflamed. Often seen as sores in the mouth.

A feeling of sickness or discomfort in the stomach that may come with an urge to vomit. Nausea is a side effect of some types of cancer therapy.

A bundle of fibers that receives and sends messages between the body and the brain. The messages are sent by chemical and electrical changes in the cells that make up the nerves.

Surgery to remove the prostate in which an attempt is made to save the nerves that help cause penile erections.

A part of the body that performs a specific function. For example, the heart is an organ.

The final part of the sex act, which involves contraction of sexual organs and a sudden release of endorphins, leading to a feeling of pleasure. In males, orgasm usually occurs with release of semen.

Cancer that forms in tissues of the ovary (one of a pair of female reproductive glands in which the ova, or eggs, are formed). Most ovarian cancers are either ovarian epithelial carcinomas (cancer that begins in the cells on the surface of the ovary) or malignant germ cell tumors (cancer that begins in egg cells).

One of a pair of female reproductive glands in which the ova, or eggs, are formed. The ovaries are located in the pelvis, one on each side of the uterus.

A colorless, odorless gas. It is needed for animal and plant life. Oxygen that is breathed in enters the blood from the lungs and travels to the tissues.

PDQ is an online database developed and maintained by the National Cancer Institute. Designed to make the most current, credible, and accurate cancer information available to health professionals and the public, PDQ contains peer-reviewed summaries on cancer treatment, screening, prevention, genetics, complementary and alternative medicine, and supportive care; a registry of cancer clinical trials from around the world; and directories of physicians, professionals who provide genetics services, and organizations that provide cancer care. Most of this information, and more specific information about PDQ, can be found on the NCI's Web site at http://www.cancer.gov/cancertopics/pdq. Also called Physician Data Query.

Having to do with the pelvis (the lower part of the abdomen located between the hip bones).

The lower part of the abdomen, located between the hip bones.

An external male reproductive organ. It contains a tube called the urethra, which carries semen and urine to the outside of the body.

An immature cell found circulating in the bloodstream. New blood cells develop from peripheral stem cells.

Cancer that forms in tissues of the prostate (a gland in the male reproductive system found below the bladder and in front of the rectum). Prostate cancer usually occurs in older men.

Having to do with how the mind works and how thoughts and feelings affect behavior.

The overall enjoyment of life. Many clinical trials assess the effects of cancer and its treatment on the quality of life. These studies measure aspects of an individual’s sense of well-being and ability to carry out various activities.

Energy released in the form of particle or electromagnetic waves. Common sources of radiation include radon gas, cosmic rays from outer space, medical x-rays, and energy given off by a radioisotope (unstable form of a chemical element that releases radiation as it breaks down and becomes more stable).

The use of high-energy radiation from x-rays, gamma rays, neutrons, protons, and other sources to kill cancer cells and shrink tumors. Radiation may come from a machine outside the body (external-beam radiation therapy), or it may come from radioactive material placed in the body near cancer cells (internal radiation therapy). Systemic radiation therapy uses a radioactive substance, such as a radiolabeled monoclonal antibody, that travels in the blood to tissues throughout the body. Also called irradiation and radiotherapy.

Surgery to remove the entire prostate. The two types of radical prostatectomy are retropubic prostatectomy (surgery through an incision in the wall of the abdomen) and perineal prostatectomy (surgery through an incision between the scrotum and the anus).

Giving off radiation.

To become well and healthy again.

By or having to do with the rectum. The rectum is the last several inches of the large intestine closest to the anus.

The last several inches of the large intestine closest to the anus.

Something that may increase the chance of developing a disease. Some examples of risk factors for cancer include age, a family history of certain cancers, use of tobacco products, certain eating habits, obesity, lack of exercise, exposure to radiation or other cancer-causing agents, and certain genetic changes.

A person's behaviors, desires, and attitudes related to sex and physical intimacy with others.

A problem that occurs when treatment affects healthy tissues or organs. Some common side effects of cancer treatment are fatigue, pain, nausea, vomiting, decreased blood cell counts, hair loss, and mouth sores.

A disturbance of normal sleep patterns. There are a number of sleep disorders that range from trouble falling asleep, to nightmares, sleepwalking, and sleep apnea (problems with breathing that cause loud snoring). Poor sleep may also be caused by diseases such as heart disease, lung disease, or nerve disorders.

The response of the body to physical, mental, or emotional pressure. This may make a person feel frustrated, angry, or anxious, and may cause unhealthy chemical changes in the body. Untreated, long-term stress may lead to many types of mental and physical health problems.

A procedure to remove or repair a part of the body or to find out whether disease is present. An operation.

An indication that a person has a condition or disease. Some examples of symptoms are headache, fever, fatigue, nausea, vomiting, and pain.

A drug used to treat certain types of breast cancer in women and men. It is also used to prevent breast cancer in women who have had ductal carcinoma in situ (abnormal cells in the ducts of the breast) and in women who are at a high risk of developing breast cancer. Tamoxifen is also being studied in the treatment of other types of cancer. It blocks the effects of the hormone estrogen in the breast. Tamoxifen is a type of antiestrogen. Also called tamoxifen citrate.

One of two egg-shaped glands inside the scrotum that produce sperm and male hormones. Also called testis.

A hormone made mainly in the testes (part of the male reproductive system). It is needed to develop and maintain male sex characteristics, such as facial hair, deep voice, and muscle growth. Testosterone may also be made in the laboratory and is used to treat certain medical conditions.

Treatment.

A group or layer of cells that work together to perform a specific function.

An abnormal mass of tissue that results when cells divide more than they should or do not die when they should. Tumors may be benign (not cancer), or malignant (cancer). Also called neoplasm.

The organs of the body that produce and discharge urine. These include the kidneys, ureters, bladder, and urethra.

The small, hollow, pear-shaped organ in a woman's pelvis. This is the organ in which a baby grows. Also called womb.

The muscular canal extending from the uterus to the exterior of the body. Also called birth canal.

Having to do with the vagina (the birth canal).

To eject some or all of the contents of the stomach through the mouth.