🌸 Endometriosis Explained – Episode 5
How Is Endometriosis Diagnosed?
For many years, endometriosis was considered a disease that could only be confirmed through surgery.
Current guidelines support a more modern, patient-centred approach: diagnosis can begin clinically and does not always require immediate laparoscopy. The 2026 SOGC management guideline complements the 2024 SOGC guideline dedicated to diagnosis and impact.
1. Clinical assessment
Diagnosis begins with a detailed history of symptoms, including:
Severe or progressively worsening period pain
Chronic pelvic pain
Pain during sexual intercourse
Painful bowel movements or urination, particularly during menstruation
Difficulty conceiving
A personal or family history suggestive of endometriosis
A focused pelvic examination may identify tenderness, reduced mobility of pelvic organs, nodularity, or an adnexal mass. However, a normal examination does not exclude endometriosis.
The SOGC recognises a clinical diagnosis based on symptoms, physical examination and appropriate basic ultrasound, even without advanced imaging or surgical confirmation.
2. Ultrasound
A routine pelvic ultrasound may detect ovarian endometriomas, but a specialised transvaginal ultrasound performed by a trained examiner can also assess deep endometriosis, adhesions, organ mobility and involvement of structures such as the bowel or bladder.
Ultrasound is highly useful—but it is operator-dependent, and normal imaging cannot reliably exclude superficial endometriosis.
3. Magnetic resonance imaging
MRI may be used when:
Deep endometriosis is suspected
Ultrasound findings are unclear
Bowel, bladder, ureteric, abdominal-wall, diaphragmatic or nerve involvement is suspected
Detailed mapping is required before complex surgery
Advanced ultrasound and MRI are particularly important for surgical planning and determining whether referral to an endometriosis centre is appropriate.
4. Laparoscopy
Laparoscopy is no longer recommended simply as the automatic first step for every woman with suspected endometriosis.
With better clinical assessment and advanced imaging, the role of purely diagnostic laparoscopy has become limited. It may still be considered when symptoms remain highly suggestive despite inconclusive assessment, because superficial lesions may not appear on imaging.
When laparoscopy is performed, it should ideally be done by a surgeon able to:
Recognise the different appearances of endometriosis
Systematically inspect the pelvis and abdomen
Treat visible disease during the same procedure when appropriate
Obtain tissue for histopathology if the diagnosis is uncertain
This helps avoid an unnecessary second operation.
Guideline Pearl
A normal ultrasound does not rule out endometriosis, and surgery is not required before every patient can receive a clinical diagnosis or begin appropriate management.
Diagnosis should be based on the complete picture: symptoms, examination, imaging findings, reproductive goals and individual preferences—not on one test alone.
💜 Listening to the patient is the first diagnostic tool.
Dr Rabab Cares
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