Endometriosis is a common gynecological condition, particularly among women of childbearing age, affecting an estimated 2 to 10 percent of American women in this age group. Endometriosis can be a debilitating disease for some women who experience ongoing pain, while others may be asymptomatic. It is also a factor in infertility. According to the American Society for Reproductive Medicine, endometriosis can be found in 24 percent to 50 percent of women who experience infertility.
The name comes from the word "endometrium," which is the tissue that lines the uterus. During a woman's regular menstrual cycle, this tissue builds up and is shed if she does not become pregnant. Women with endometriosis develop tissue that looks and acts like endometrial tissue outside the uterus, usually on other reproductive organs inside the pelvis or in the abdominal cavity. Each month, this misplaced tissue responds to the hormonal changes of the menstrual cycle by building up and breaking down just as the endometrium does, resulting in internal bleeding.
Unlike menstrual fluid from the uterus which is shed by the body, blood from the misplaced tissue has nowhere to go, resulting in the tissues surrounding the endometriosis becoming inflamed or swollen. This process can produce scar tissue around the area which may develop into lesions or growths. In some cases, particularly when an ovary is involved, the blood can become embedded in the tissue where it is located, forming blood blisters that may become surrounded by a fibrous cyst.
A staging system has been developed by the American Society of Reproductive Medicine (formerly the American Fertility Society). The stages are classified according to the following:
The stage of endometriosis is based on the location, amount, depth, and size of the endometrial implants. Specific criteria include:
The stage of the endometriosis does not necessarily reflect the level of pain experienced, risk of infertility, or symptoms present. For example, it is possible for a woman in Stage I to be in tremendous pain, while a woman in Stage IV may be asymptomatic. In addition, women who receive treatment during the first two stages of the disease have the greatest chance of regaining their ability to become pregnant following treatment.
Endometriosis is most often found in the ovaries, but can also be found in other places, including:
Occasionally, the implants are found in other places, such as:
The following are the most common symptoms for endometriosis, however, each individual may experience symptoms differently. Symptoms of endometriosis may include:
It is important to note that the amount of pain a woman experiences is not necessarily related to the severity of the disease - some women with severe endometriosis may experience no pain, while others with a milder form of the disease may have severe pain or other symptoms.
Endometriosis rarely leads to endometrial cancer - this occurs in less than one percent of women with the disease.
Endometriosis is considered one of the three major causes of female infertility. In mild to moderate cases, the infertility may be just temporary. In these cases, surgery to remove adhesions, cysts, and scar tissue can restore fertility. In other cases (a very small percentage), women may remain infertile. How endometriosis affects fertility is not clearly understood. It is thought that scar tissue from endometriosis can impair release of the egg from the ovary and pickup by the fallopian tube. Other mechanisms thought to affect fertility include changes in the uterine lining that result in impaired implantation of the fertilized egg.
The causes of endometriosis are still unknown, although many theories abound. One theory suggests that during menstruation some of the tissue backs up through the fallopian tubes into the abdomen, a sort of "reverse menstruation," where it attaches and grows. Another theory states that certain families may have predisposing genetic factors to the disease. Current research is also looking at the role of the immune system in activating cells that may secrete factors which stimulate endometriosis.
A: While the symptoms you describe can indicate endometriosis, they are also common symptoms of other gynecological conditions such as a hormonal imbalance, fibroids, or polyps. There is an increase risk of endometriosis in women who have a first-degree family member, such as a mother or sister, with the disease.
The best way to determine if endometriosis (or any other condition) is present is to visit your gynecologist for a complete physical and pelvic examination. Your physician will conduct diagnostic tests to rule out other conditions. The only way to diagnose endometriosis is through a laparoscopy, which allows the physician to determine if there are endometrial growths by using a laparoscope (tube with lens and light). Today, laser surgery is becoming a more common method for removing these growths in mild to moderate cases.
While any woman may develop endometriosis, the following women seem to be at an increased risk for the disease:
For many women, simply having a diagnosis of endometriosis brings relief. Diagnosis begins with a gynecologist evaluating a patient's medical history and a complete physical examination including a pelvic exam. A diagnosis of endometriosis can only be certain when the physician performs a laparoscopy (a minor surgical procedure in which a laparoscope, a thin tube with a lens and a light, is inserted into an incision in the abdominal wall. Using the laparoscope to see into the pelvic area, the physician can often determine the locations, extent, and size of the endometrial growths).
Other examinations which may be used in the diagnosis of endometriosis include:
Specific treatment for endometriosis will be determined by your health care provider based on:
If symptoms are mild, health care providers generally agree that no further treatment, other than pain medication, is necessary.
In general, treatment for endometriosis may include:
Surgical techniques which may be used to treat endometriosis include:
Sometimes a combination of therapies is used, such as conservative surgery (laparoscopy or laparotomy), along with hormone therapy.
Some women also benefit from alternative treatments used in conjunction with other medical and surgical therapies for the treatment of endometriosis. These include:
It is important to discuss any/all of these treatments thoroughly with your health care provider, as some may conflict with the effectiveness of others.
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