Endometriosis: Disease burden and the problem of missed or delayed diagnosis

What is the incidence of endometriosis in women, and does the condition affect certain patient populations more often than others?

Dr. Taylor: Endometriosis occurs in about 5% to 10% of reproductive-aged women, and it is underdiagnosed. Many women have subtle endometriosis or asymptomatic endometriosis that may be missed or may take a long time to diagnose, and the incidence may be somewhat higher. It is much more common in women with pelvic pain, as these women have a greater than 50% incidence of endometriosis, and those with infertility similarly have roughly a 50% incidence of endometriosis. Endometriosis is a very common disease, most common in the reproductive age range, particularly more common in the most fertile years. The typical course of the disease is that it begins in teenagers or in the early 20s, progresses through the 20s and 30s, but starts to wane in the 40s, and goes away at the time of menopause in the early 50s. Those particularly susceptible to the disease are those with early menarche or frequent or heavy periods. Recurrent periods lead to more retrograde menstruation, which is menstrual flow through the fallopian tubes. It then starts to implant in the abdomen, specifically in the peritoneal cavity.

What are some of the reasons for missed or delayed diagnosis?

Dr. Taylor: There are many reasons why diagnosis may be missed or delayed. One of the most common reasons for delayed diagnosis is that the patient does not know that painful periods are not normal and may not report them to her clinician. Dysmenorrhea, or menstrual pain, is the only pain that we consider normal. It is the only experience we go through that is expected to hurt. It is also a very subjective issue. How do you know if your menstrual cramps are worse than someone else’s? Often, the first thing that happens when someone complains about severe dysmenorrhea is that their friends or family members will say to them, “We all get menstrual cramps. Just toughen up and bear with it.” But, of course, sometimes these menstrual cramps, or dysmenorrhea, get so bad that they become disabling. When people miss school or work, or they cannot participate in normal social or athletic activities, that is when they first get attention. Often, the disease has been bothering someone for a long time before it is diagnosed.

Another reason that diagnosis may be delayed is because of the social stigma surrounding discussing these types of issues. It is difficult sometimes, especially for a teenager, to talk about issues such as painful periods, pain with bowel movements or urination, or pain with intercourse. A generation ago, people did not talk about such topics so openly and publicly. Thankfully, it is becoming easier, and I think this generation is more open to talking about these issues, but it is still difficult for some who are hesitant to discuss it. Parents can also have a difficult time discussing these issues with their children, and they may dismiss it. Even physicians who are not familiar with this issue may not be comfortable discussing these matters.

Other times, it is truly asymptomatic. Someone can have significant endometriosis that does not show up until it is found on ultrasonography or until someone tries to get pregnant but experiences infertility, and then it is recognized. Typically, people with endometriosis do present with painful menses. If we are more attuned to listening for those symptoms and open to talking about these symptoms, I think we can catch this disease much earlier.

Another barrier to diagnosis is that for too long the gold standard has been surgery, a laparoscopy, to look for endometriosis. If that is a clinician’s method of determining if somebody has endometriosis, it creates quite a barrier to diagnosis. In the near future, I believe we will have noninvasive tests that will help us determine if somebody has endometriosis without surgery. Even now a clinical history can be very helpful in deciding who has endometriosis. I am also of the opinion that people are becoming much more confident about making a clinical diagnosis of endometriosis.

Diagnosing endometriosis relies on identifying flags in the patient’s history and through physical exams. How can clinicians better their chances for having the flags converge for successful diagnosis?

Dr. Taylor: I think it is important to keep the focus on some of the main symptoms of endometriosis. Most women with endometriosis start by having dysmenorrhea, which progresses over time. Some women with painful periods from menarche may not have endometriosis. Their primary dysmenorrhea may be due to other etiologies. If someone has relatively normal menses initially and then goes on to have progressively increasing dysmenorrhea, most often that is endometriosis. Eventually, the pain can spread to other times in the cycle, beyond just dysmenorrhea. Pain can start in the pelvis, but, as endometriosis causes side effects outside of the reproductive organs, it can start to affect other organs and start to cause pain outside of the pelvis. Endometriosis can also inflame the pelvis and affect the bowel, the bladder, and many other surrounding organs. If somebody has bowel symptoms or bladder symptoms that are cyclic and accompanied by dysmenorrhea or cyclic pelvic pain, endometriosis should be thought of first, rather than a primary bowel or bladder problem. Too often medical professionals can be misled by these other false clues. I have seen many patients who come to me after a very thorough workup for a gastrointestinal issue, including a colonoscopy, or a bladder issue, including a cystoscopy, when the underlying problem really was endometriosis. It is important not to be misled by these “red herrings,” and to focus on progressive cyclic pelvic pain.  Endometriosis is always at least initially cyclic in character.

We also know that endometriosis can have effects far beyond the pelvis. Conditions such as anxiety and depression are more common in patients with endometriosis. Women with endometriosis tend to be thinner. There are many other manifestations of this disease. Although it is complex, and can affect almost any organ system, we need to focus on the primary problem, which is cyclic pelvic pain that is progressive in nature. A woman who has dysmenorrhea that may progress to cyclic pain that gets worse over time, more than likely has endometriosis. We can rule out other etiologies, such as masses, fibroids, and cysts, with a simple physical exam and/or an ultrasound. In general, from a good history focusing on the cyclic progressive pelvic pain and a good physical exam to rule out other etiologies for that pain, we can rapidly narrow in on the diagnosis of endometriosis. We can make the diagnosis very straightforward. Cyclic progressive pelvic pain is essentially synonymous with endometriosis.

With a current medical lens focused on addressing racial disparities and inequities in medicine, do you feel that there are gaps in endometriosis study enrollment, diagnosis, and management that need to be addressed?

Dr. Taylor: Traditionally, there have been disparities in diagnosing endometriosis. There was a time when it was presumed that White women had endometriosis and Black women were more likely to have an infectious etiology for their pelvic pain—which is not true. The incidence is slightly higher in Asian and White women compared with Black women, but this is very likely because of bias and access to care. When examining women who have been diagnosed and are being evaluated and treated for infertility, those racial differences disappear. When access to care is available, when patients are seen by a physician, when they are under medical care for another reason, the racial disparities are not seen in endometriosis; it occurs equally. I think there clearly are disparities in access and bias in how we diagnose endometriosis; we should be cognizant of that and realize that endometriosis is very similar in its frequency in all ethnic groups.

What is the incidence of endometriosis in women, and does the condition affect certain patient populations more often than others?

Dr. Taylor: Endometriosis occurs in about 5% to 10% of reproductive-aged women, and it is underdiagnosed. Many women have subtle endometriosis or asymptomatic endometriosis that may be missed or may take a long time to diagnose, and the incidence may be somewhat higher. It is much more common in women with pelvic pain, as these women have a greater than 50% incidence of endometriosis, and those with infertility similarly have roughly a 50% incidence of endometriosis. Endometriosis is a very common disease, most common in the reproductive age range, particularly more common in the most fertile years. The typical course of the disease is that it begins in teenagers or in the early 20s, progresses through the 20s and 30s, but starts to wane in the 40s, and goes away at the time of menopause in the early 50s. Those particularly susceptible to the disease are those with early menarche or frequent or heavy periods. Recurrent periods lead to more retrograde menstruation, which is menstrual flow through the fallopian tubes. It then starts to implant in the abdomen, specifically in the peritoneal cavity.

What are some of the reasons for missed or delayed diagnosis?

Dr. Taylor: There are many reasons why diagnosis may be missed or delayed. One of the most common reasons for delayed diagnosis is that the patient does not know that painful periods are not normal and may not report them to her clinician. Dysmenorrhea, or menstrual pain, is the only pain that we consider normal. It is the only experience we go through that is expected to hurt. It is also a very subjective issue. How do you know if your menstrual cramps are worse than someone else’s? Often, the first thing that happens when someone complains about severe dysmenorrhea is that their friends or family members will say to them, “We all get menstrual cramps. Just toughen up and bear with it.” But, of course, sometimes these menstrual cramps, or dysmenorrhea, get so bad that they become disabling. When people miss school or work, or they cannot participate in normal social or athletic activities, that is when they first get attention. Often, the disease has been bothering someone for a long time before it is diagnosed.

Another reason that diagnosis may be delayed is because of the social stigma surrounding discussing these types of issues. It is difficult sometimes, especially for a teenager, to talk about issues such as painful periods, pain with bowel movements or urination, or pain with intercourse. A generation ago, people did not talk about such topics so openly and publicly. Thankfully, it is becoming easier, and I think this generation is more open to talking about these issues, but it is still difficult for some who are hesitant to discuss it. Parents can also have a difficult time discussing these issues with their children, and they may dismiss it. Even physicians who are not familiar with this issue may not be comfortable discussing these matters.

Other times, it is truly asymptomatic. Someone can have significant endometriosis that does not show up until it is found on ultrasonography or until someone tries to get pregnant but experiences infertility, and then it is recognized. Typically, people with endometriosis do present with painful menses. If we are more attuned to listening for those symptoms and open to talking about these symptoms, I think we can catch this disease much earlier.

Another barrier to diagnosis is that for too long the gold standard has been surgery, a laparoscopy, to look for endometriosis. If that is a clinician’s method of determining if somebody has endometriosis, it creates quite a barrier to diagnosis. In the near future, I believe we will have noninvasive tests that will help us determine if somebody has endometriosis without surgery. Even now a clinical history can be very helpful in deciding who has endometriosis. I am also of the opinion that people are becoming much more confident about making a clinical diagnosis of endometriosis.

Diagnosing endometriosis relies on identifying flags in the patient’s history and through physical exams. How can clinicians better their chances for having the flags converge for successful diagnosis?

Dr. Taylor: I think it is important to keep the focus on some of the main symptoms of endometriosis. Most women with endometriosis start by having dysmenorrhea, which progresses over time. Some women with painful periods from menarche may not have endometriosis. Their primary dysmenorrhea may be due to other etiologies. If someone has relatively normal menses initially and then goes on to have progressively increasing dysmenorrhea, most often that is endometriosis. Eventually, the pain can spread to other times in the cycle, beyond just dysmenorrhea. Pain can start in the pelvis, but, as endometriosis causes side effects outside of the reproductive organs, it can start to affect other organs and start to cause pain outside of the pelvis. Endometriosis can also inflame the pelvis and affect the bowel, the bladder, and many other surrounding organs. If somebody has bowel symptoms or bladder symptoms that are cyclic and accompanied by dysmenorrhea or cyclic pelvic pain, endometriosis should be thought of first, rather than a primary bowel or bladder problem. Too often medical professionals can be misled by these other false clues. I have seen many patients who come to me after a very thorough workup for a gastrointestinal issue, including a colonoscopy, or a bladder issue, including a cystoscopy, when the underlying problem really was endometriosis. It is important not to be misled by these “red herrings,” and to focus on progressive cyclic pelvic pain.  Endometriosis is always at least initially cyclic in character.

We also know that endometriosis can have effects far beyond the pelvis. Conditions such as anxiety and depression are more common in patients with endometriosis. Women with endometriosis tend to be thinner. There are many other manifestations of this disease. Although it is complex, and can affect almost any organ system, we need to focus on the primary problem, which is cyclic pelvic pain that is progressive in nature. A woman who has dysmenorrhea that may progress to cyclic pain that gets worse over time, more than likely has endometriosis. We can rule out other etiologies, such as masses, fibroids, and cysts, with a simple physical exam and/or an ultrasound. In general, from a good history focusing on the cyclic progressive pelvic pain and a good physical exam to rule out other etiologies for that pain, we can rapidly narrow in on the diagnosis of endometriosis. We can make the diagnosis very straightforward. Cyclic progressive pelvic pain is essentially synonymous with endometriosis.

With a current medical lens focused on addressing racial disparities and inequities in medicine, do you feel that there are gaps in endometriosis study enrollment, diagnosis, and management that need to be addressed?

Dr. Taylor: Traditionally, there have been disparities in diagnosing endometriosis. There was a time when it was presumed that White women had endometriosis and Black women were more likely to have an infectious etiology for their pelvic pain—which is not true. The incidence is slightly higher in Asian and White women compared with Black women, but this is very likely because of bias and access to care. When examining women who have been diagnosed and are being evaluated and treated for infertility, those racial differences disappear. When access to care is available, when patients are seen by a physician, when they are under medical care for another reason, the racial disparities are not seen in endometriosis; it occurs equally. I think there clearly are disparities in access and bias in how we diagnose endometriosis; we should be cognizant of that and realize that endometriosis is very similar in its frequency in all ethnic groups.

What is the incidence of endometriosis in women, and does the condition affect certain patient populations more often than others?

Dr. Taylor: Endometriosis occurs in about 5% to 10% of reproductive-aged women, and it is underdiagnosed. Many women have subtle endometriosis or asymptomatic endometriosis that may be missed or may take a long time to diagnose, and the incidence may be somewhat higher. It is much more common in women with pelvic pain, as these women have a greater than 50% incidence of endometriosis, and those with infertility similarly have roughly a 50% incidence of endometriosis. Endometriosis is a very common disease, most common in the reproductive age range, particularly more common in the most fertile years. The typical course of the disease is that it begins in teenagers or in the early 20s, progresses through the 20s and 30s, but starts to wane in the 40s, and goes away at the time of menopause in the early 50s. Those particularly susceptible to the disease are those with early menarche or frequent or heavy periods. Recurrent periods lead to more retrograde menstruation, which is menstrual flow through the fallopian tubes. It then starts to implant in the abdomen, specifically in the peritoneal cavity.

What are some of the reasons for missed or delayed diagnosis?

Dr. Taylor: There are many reasons why diagnosis may be missed or delayed. One of the most common reasons for delayed diagnosis is that the patient does not know that painful periods are not normal and may not report them to her clinician. Dysmenorrhea, or menstrual pain, is the only pain that we consider normal. It is the only experience we go through that is expected to hurt. It is also a very subjective issue. How do you know if your menstrual cramps are worse than someone else’s? Often, the first thing that happens when someone complains about severe dysmenorrhea is that their friends or family members will say to them, “We all get menstrual cramps. Just toughen up and bear with it.” But, of course, sometimes these menstrual cramps, or dysmenorrhea, get so bad that they become disabling. When people miss school or work, or they cannot participate in normal social or athletic activities, that is when they first get attention. Often, the disease has been bothering someone for a long time before it is diagnosed.

Another reason that diagnosis may be delayed is because of the social stigma surrounding discussing these types of issues. It is difficult sometimes, especially for a teenager, to talk about issues such as painful periods, pain with bowel movements or urination, or pain with intercourse. A generation ago, people did not talk about such topics so openly and publicly. Thankfully, it is becoming easier, and I think this generation is more open to talking about these issues, but it is still difficult for some who are hesitant to discuss it. Parents can also have a difficult time discussing these issues with their children, and they may dismiss it. Even physicians who are not familiar with this issue may not be comfortable discussing these matters.

Other times, it is truly asymptomatic. Someone can have significant endometriosis that does not show up until it is found on ultrasonography or until someone tries to get pregnant but experiences infertility, and then it is recognized. Typically, people with endometriosis do present with painful menses. If we are more attuned to listening for those symptoms and open to talking about these symptoms, I think we can catch this disease much earlier.

Another barrier to diagnosis is that for too long the gold standard has been surgery, a laparoscopy, to look for endometriosis. If that is a clinician’s method of determining if somebody has endometriosis, it creates quite a barrier to diagnosis. In the near future, I believe we will have noninvasive tests that will help us determine if somebody has endometriosis without surgery. Even now a clinical history can be very helpful in deciding who has endometriosis. I am also of the opinion that people are becoming much more confident about making a clinical diagnosis of endometriosis.

Diagnosing endometriosis relies on identifying flags in the patient’s history and through physical exams. How can clinicians better their chances for having the flags converge for successful diagnosis?

Dr. Taylor: I think it is important to keep the focus on some of the main symptoms of endometriosis. Most women with endometriosis start by having dysmenorrhea, which progresses over time. Some women with painful periods from menarche may not have endometriosis. Their primary dysmenorrhea may be due to other etiologies. If someone has relatively normal menses initially and then goes on to have progressively increasing dysmenorrhea, most often that is endometriosis. Eventually, the pain can spread to other times in the cycle, beyond just dysmenorrhea. Pain can start in the pelvis, but, as endometriosis causes side effects outside of the reproductive organs, it can start to affect other organs and start to cause pain outside of the pelvis. Endometriosis can also inflame the pelvis and affect the bowel, the bladder, and many other surrounding organs. If somebody has bowel symptoms or bladder symptoms that are cyclic and accompanied by dysmenorrhea or cyclic pelvic pain, endometriosis should be thought of first, rather than a primary bowel or bladder problem. Too often medical professionals can be misled by these other false clues. I have seen many patients who come to me after a very thorough workup for a gastrointestinal issue, including a colonoscopy, or a bladder issue, including a cystoscopy, when the underlying problem really was endometriosis. It is important not to be misled by these “red herrings,” and to focus on progressive cyclic pelvic pain.  Endometriosis is always at least initially cyclic in character.

We also know that endometriosis can have effects far beyond the pelvis. Conditions such as anxiety and depression are more common in patients with endometriosis. Women with endometriosis tend to be thinner. There are many other manifestations of this disease. Although it is complex, and can affect almost any organ system, we need to focus on the primary problem, which is cyclic pelvic pain that is progressive in nature. A woman who has dysmenorrhea that may progress to cyclic pain that gets worse over time, more than likely has endometriosis. We can rule out other etiologies, such as masses, fibroids, and cysts, with a simple physical exam and/or an ultrasound. In general, from a good history focusing on the cyclic progressive pelvic pain and a good physical exam to rule out other etiologies for that pain, we can rapidly narrow in on the diagnosis of endometriosis. We can make the diagnosis very straightforward. Cyclic progressive pelvic pain is essentially synonymous with endometriosis.

With a current medical lens focused on addressing racial disparities and inequities in medicine, do you feel that there are gaps in endometriosis study enrollment, diagnosis, and management that need to be addressed?

Dr. Taylor: Traditionally, there have been disparities in diagnosing endometriosis. There was a time when it was presumed that White women had endometriosis and Black women were more likely to have an infectious etiology for their pelvic pain—which is not true. The incidence is slightly higher in Asian and White women compared with Black women, but this is very likely because of bias and access to care. When examining women who have been diagnosed and are being evaluated and treated for infertility, those racial differences disappear. When access to care is available, when patients are seen by a physician, when they are under medical care for another reason, the racial disparities are not seen in endometriosis; it occurs equally. I think there clearly are disparities in access and bias in how we diagnose endometriosis; we should be cognizant of that and realize that endometriosis is very similar in its frequency in all ethnic groups.