Why Are We Still Misdiagnosing Endometriosis?

Why Are We Still Misdiagnosing Endometriosis?

Despite advancements in medical technology and research, endometriosis remains one of the most misdiagnosed and underdiagnosed conditions in women’s health. Many patients suffer for years or even decades before receiving a correct diagnosis. This delay is not just a minor inconvenience—it has profound consequences for a woman’s physical, emotional, and reproductive health.

So, why does misdiagnosis still happen? Why are so many women told their pain is “normal” or mistaken for conditions like irritable bowel syndrome (IBS), pelvic inflammatory disease (PID), or even psychological disorders? In this article, we will explore the key reasons behind the diagnostic failure, the consequences of misdiagnosis, and how Centers of Excellence for Endometriosis could be a game-changer.

The Culture of Dismissing Women’s Pain

For centuries, women’s pain has been downplayed and dismissed as hysteria, exaggeration, or a normal part of being female. This bias has persisted into modern medicine, leading to underreporting, late diagnosis, and unnecessary suffering for patients.

A study in The American Journal of Obstetrics & Gynaecology found that women with chronic pain were more likely than men to be prescribed antidepressants instead of proper medical investigations (1).

Many women with endometriosis are told their pain is “just a bad period” and are advised to take over-the-counter painkillers without further examination.

The belief that “pain is normal for women” contributes to delays in seeking specialist care.

The Unique Pain of Endometriosis: Hypersensitization and Nerve Growth

Endometriosis pain is not just severe period cramps—it is a complex, multifaceted pain syndrome that arises from increased nerve fibers and chronic inflammation. Unlike ordinary menstrual pain, endometriosis-related pain is often neuropathic in nature, meaning that the nerves themselves become hypersensitized and overreact to stimuli that would normally be harmless.

Studies have shown that endometriotic lesions contain an increased density of nerve fibers, particularly in deep endometriosis (DE). This nerve proliferation leads to heightened pain perception—a condition known as central sensitization, where the nervous system amplifies pain signals even in the absence of active disease. As a result, many patients experience persistent pelvic pain, even outside their menstrual cycles or long after surgical excision of endometriotic lesions. (6,7)

Moreover, this hypersensitization can make endometriosis patients more prone to visceral pain, which means they might feel pain not just in the pelvis but also in distant areas, such as the lower back, thighs, or even the diaphragm in cases of thoracic endometriosis. This widespread pain pattern often contributes to misdiagnosis, as some doctors mistake the symptoms for irritable bowel syndrome (IBS), interstitial cystitis, or musculoskeletal issues. (8,9)

Recognizing the role of nerve fiber proliferation and central sensitization in endometriosis is crucial in refining treatment strategies. Beyond surgical excision, neuromodulatory approaches—such as nerve pain medications (e.g., gabapentinoids), pelvic physiotherapy, and even cognitive behavioral therapy—are increasingly being explored as part of a multidisciplinary pain management plan for these patients.

Symptom Overlap with Other Conditions

Endometriosis is called the “great masquerader” because its symptoms mimic several other conditions. Common misdiagnoses include:

Irritable Bowel Syndrome (IBS)

Many women with endometriosis report bloating, diarrhea, or constipation, leading doctors to mistakenly diagnose IBS instead of investigating pelvic pain.(8)

Urinary Tract Infections (UTIs)

Some patients experience chronic pelvic pain and urinary frequency, making doctors suspect recurring UTIs rather than endometriosis affecting the bladder.

Pelvic Inflammatory Disease (PID)

Due to pelvic pain and inflammation, many women with endometriosis are incorrectly diagnosed with PID, leading to unnecessary antibiotic treatments.

Psychological Disorders

Some women are even told their pain is “all in their head” and referred to psychiatric care before a gynecological examination is done.

The Flaws in Current Diagnostic Approaches

A major reason why misdiagnosis persists is the lack of non-invasive, definitive diagnostic tools for endometriosis. However, advancements in transvaginal ultrasound (TVUS) by trained specialists have revolutionized early diagnosis, allowing highly predictive and reliable detection of deep endometriosis (DE) and ovarian endometriomas (2, 10).

Advanced Ultrasound (TVUS) is now recommended

Expert-led transvaginal ultrasound has been shown to replace laparoscopy as a first-line clinical diagnostic tool, significantly reducing delays in treatment initiation (2,3).

MRI is underutilized

While useful for detecting deep infiltrating lesions, not all radiologists are trained to interpret endometriosis scans accurately.

Blood tests are unreliable

There is no definitive biomarker for endometriosis, making it difficult to diagnose through standard blood tests.

The Consequences of Misdiagnosis

The impact of delayed or incorrect diagnosis is devastating for patients. It can lead to:

  • Progression of the disease: Without timely intervention, endometriosis can progress to severe forms involving the bowel, bladder, and ureters, making treatment more complex.
  • Multiple unnecessary treatments: Many women undergo years of failed treatments—from repeated courses of antibiotics to psychological counseling—before finally getting a proper diagnosis.
  • Infertility issues: The longer endometriosis remains untreated, the higher the risk of compromised fertility, as the disease can damage the ovaries and fallopian tubes.
  • Emotional and psychological distress: Studies show that 50% of women with endometriosis experience depression and anxiety, often due to years of being dismissed and misdiagnosed (4).

The Need for Endometriosis Dedicated Center

The solution to the widespread misdiagnosis of endometriosis lies in specialized, multidisciplinary Centers of Excellence that focus on:

Improving early diagnosis

Training gynaecologists, radiologists, and general practitioners to recognize symptoms early and utilize advanced imaging techniques like expert-led transvaginal ultrasound.

Providing multidisciplinary care

Involving colorectal surgeons, urologists, pain specialists, and fertility experts to ensure holistic treatment.

Standardizing diagnostic protocols

Ensuring that all suspected cases undergo high-resolution ultrasound and MRI as the first-line diagnostic approach before invasive surgery is considered.

Raising awareness

Educating medical students, primary care doctors, and the general public to recognize endometriosis and take patient complaints seriously.

Conclusion

The misdiagnosis of endometriosis is a systemic failure that has persisted for far too long. Women continue to suffer due to outdated medical perspectives, symptom overlap with other conditions, and a lack of standardized diagnostic pathways. The establishment of Centers of Excellence dedicated to endometriosis care could revolutionize early diagnosis, treatment, and long-term patient outcomes.

As we move forward in this series, we will explore how preoperative imaging can improve surgical outcomes, the challenges in recurrence prevention, and the future of minimally invasive surgical techniques.

It’s time to break the cycle of misdiagnosis and give endometriosis the attention and resources it truly deserves.

References

  1. Samulowitz A, Gremyr A, Eriksson E, et al. (2018). “The Gender Bias in Pain Management: A Systematic Review”. Pain Research and Management, 2018, 1-9.
  2. Guerriero S, Condous G, van den Bosch T, et al. (2016). “Systematic approach to sonographic evaluation of the pelvis in women with suspected endometriosis”. Ultrasound in Obstetrics & Gynecology, 48(5), 687-695.
  3. Hudelist G, Fritzer N, Staettner S, et al. (2011). “Diagnostic accuracy of transvaginal ultrasound for deep infiltrating endometriosis in a routine clinical setting”. Human Reproduction, 26(2), 372-377.
  4. Facchin F, Barbara G, Dridi D, et al. (2015). “The impact of endometriosis on mental health”. Human Reproduction, 30(5): 1043-1051.
  5. Moradi M, Parker M, Sneddon A, et al. (2014). “Impact of endometriosis misdiagnosis on patients”. BMC Women’s Health, 14(1): 16.
  6. Chih-Feng Yen, Mukhri Hamdan, Pattaya Hengrasmee, Zhongwei Huang et al. Improving the diagnosis of endometriosis in Asia-Pacific: Consensus from the Asia-Pacific Endometriosis Expert Panel for Endometriosis. Int J Gynecol Obstet. 2023;163:720–732.
  7. Moradi Y, Shams-Beyranvand M, Khateri S et al. A systematic review on the prevalence of endometriosis in women. Indian J Med Res. 2021 Mar;154(3):446-454.
  8. Soliman AM, Coyne KS, Gries KSet al. The Effect of Endometriosis Symptoms on Absenteeism and Presenteeism in the Workplace and at Home. J Manag Care Spec Pharm. 2017 Jul;23(7):745-754
  9. Denny E. Women’s experience of endometriosis. J Adv Nurs. 2004 Jun;46(6)
  10. Sachedina A, Todd N. Dysmenorrhea, Endometriosis and Chronic Pelvic Pain in Adolescents. J Clin Res Pediatr Endocrinol. 2020 Feb 6;12(Suppl 1):7-17

Consultant Gynaecologist & Endometriosis Specialist

Advanced MIS & Robotic Surgeon

Unit 212, Hospital Picaso

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