Deep Endometriosis Ultrasound: Understanding the DIE Scan
Pelvic pain can have many causes, and endometriosis does not affect everyone in the same way. Some people experience severe pain that interferes with work, sleep or everyday activities, while others may have few noticeable symptoms.
When endometriosis is suspected, a specialised pelvic ultrasound may provide useful information about the uterus, ovaries and surrounding pelvic structures. This can be particularly helpful when there is concern about deep endometriosis, also known as deep infiltrating endometriosis.
A specialised examination may look beyond the uterus and ovaries to assess the relationship between pelvic organs, their movement and areas where deep disease may be present.
Not all endometriosis can be seen on ultrasound. The scan needs to be considered alongside your symptoms, medical history and clinical assessment.
What Is Endometriosis?
Endometriosis is a condition in which tissue similar to the lining of the uterus is found outside the uterus. It most commonly affects structures within the pelvis, including the ovaries and tissues around the uterus, but it can also involve the bowel, bladder and other areas.
Endometriosis can cause inflammation, scarring and adhesions. Symptoms may include painful periods, ongoing pelvic pain, pain during sexual intercourse, pain when passing stool or urine, and difficulty becoming pregnant in some people.
The severity of symptoms does not always match the amount of disease that can be seen on imaging. Someone with significant pain may have relatively limited visible disease, while another person with more extensive disease may experience fewer symptoms.
What Is Deep Endometriosis?
Deep endometriosis refers to disease that extends deeper into pelvic tissues and may involve structures such as the bowel, bladder, pelvic sidewall and other tissues.
Deep disease can be more complex to assess because inflammation and scarring may change the normal anatomy of the pelvis. Pelvic organs that would normally move freely may become less mobile or may appear closely related to one another.
A specialised ultrasound may be useful when the clinical history raises concern about deep endometriosis. The examination is not simply about looking for an ovarian cyst. It can involve a more detailed assessment of the pelvic anatomy and the relationship between different structures.
What Can a Deep Endometriosis Ultrasound Look For?
Depending on the examination protocol and the reason for referral, a specialised pelvic ultrasound may assess:
- The uterus and ovaries
- Ovarian endometriomas
- The position and mobility of pelvic organs
- Possible pelvic adhesions
- Structures around the bowel and bladder
- Features that may suggest deep endometriosis
- Other pelvic findings that may provide useful information for further investigation or treatment planning
A detailed examination can help build a broader picture of the pelvis rather than focusing on a single abnormality.
How Is a DIE Ultrasound Different From a Routine Pelvic Ultrasound?
A routine pelvic ultrasound generally assesses the uterus, ovaries and other pelvic structures.
A specialised deep endometriosis examination provides a more focused assessment when deep disease is suspected. Depending on the examination protocol, the practitioner may pay particular attention to areas around the bowel and bladder, pelvic organ mobility, and the relationship between pelvic structures.
The examination may include both an abdominal and an internal ultrasound. An internal ultrasound is performed when it is appropriate for the patient and with their consent.
Not everyone with pelvic pain requires a specialised DIE examination. The appropriate investigation depends on the patient’s symptoms, medical history and the reason the examination has been requested.
| Examination Type | Primary Focus & Scope |
|---|---|
| Routine Pelvic Ultrasound | Generally assesses the uterus, ovaries and standard pelvic structures. |
| Specialised DIE Ultrasound | Provides a focused assessment when deep disease is suspected, paying particular attention to areas around the bowel and bladder, pelvic organ mobility, and the relationship between pelvic structures. |
What Symptoms May Lead to a DIE Ultrasound?
A doctor may consider specialised pelvic imaging when symptoms or medical history raise concern about endometriosis.
Pelvic & Period Pain
Severe or persistent pelvic pain, or painful periods that interfere with normal activities.
Pain During Intercourse
Pain experienced during or after sexual intercourse.
Bowel & Urinary Symptoms
Pain when passing stool or urine (particularly around menstruation or when cyclical), bloating, constipation, diarrhoea, or urinary frequency and pelvic pressure.
Fertility Considerations
Difficulty becoming pregnant in some patients.
- Severe or persistent pelvic pain
- Painful periods that interfere with normal activities
- Pain during or after sexual intercourse
- Pain when passing stool, particularly around menstruation
- Pain when passing urine, particularly when symptoms are cyclical
- Bowel symptoms such as bloating, constipation or diarrhoea
- Urinary symptoms such as increased frequency or pelvic pressure
- Difficulty becoming pregnant in some patients
These symptoms can have many different causes. Having one or more of them does not necessarily mean that a person has endometriosis.
What Is an Ovarian Endometrioma?
An endometrioma is an ovarian cyst associated with endometriosis. It contains old blood and is sometimes referred to as a “chocolate cyst” because of its typical appearance.
Endometriomas can be identified during an ultrasound examination. However, finding an endometrioma does not tell us how much endometriosis may be present elsewhere in the pelvis.
A person with an endometrioma may also have superficial or deep endometriosis in other areas, which is why a broader pelvic assessment may be useful.
Why Do Pelvic Adhesions Matter?
Adhesions are bands of scar-like tissue that can cause organs or tissues within the pelvis to stick together.
Inflammation associated with endometriosis can contribute to adhesions. When pelvic structures become less mobile or fixed in an unusual position, this may provide a useful clue during a specialised ultrasound assessment.
Ultrasound cannot show every small or superficial area of disease, so these findings need to be interpreted in the context of the patient’s symptoms and other clinical information.
How Should You Prepare for a DIE Ultrasound?
Preparation requirements can vary depending on the type of examination, the imaging protocol and the imaging provider.
For this reason, patients should always follow the specific instructions provided by their imaging service rather than relying on a general checklist found online.
Preparation may involve instructions about bowel preparation, food and drink, and bladder filling.
Some pelvic ultrasound examinations require a partially or adequately filled bladder because this can improve the view of pelvic structures. Other examinations may use different bladder preparation, particularly when an internal examination is planned.
Do not assume that drinking more water is better. Follow the exact instructions provided by the imaging team.
What Happens During the Examination?
Before the examination, the imaging professional may ask about your symptoms, previous imaging and relevant medical history.
Depending on the examination protocol, the scan may begin with an abdominal ultrasound.
If an internal ultrasound is appropriate and consented to, a specially designed probe may be used to obtain closer views of the pelvic organs.
The practitioner may assess the uterus, ovaries and surrounding pelvic structures and may look at the position and mobility of the organs. Images and measurements are recorded as part of the examination and are then prepared for reporting.
An internal ultrasound is a medical procedure. You should receive an explanation before the examination and should feel comfortable telling the practitioner if you experience discomfort or need a pause.
How Long Does a DIE Ultrasound Take?
A specialised DIE ultrasound examination typically takes approximately 30 to 40 minutes.
The actual appointment time may vary depending on the examination protocol and individual circumstances.
What Can a DIE Scan Tell You?
A specialised ultrasound may identify findings that suggest deep endometriosis, an ovarian endometrioma, or changes in the movement and position of pelvic organs.
It can also provide useful information about the relationship between different pelvic structures.
The scan result may be suggestive of endometriosis, inconclusive, or show no obvious evidence of the condition.
If the Scan Suggests Endometriosis
Your doctor may discuss treatment options, referral to a gynaecology or endometriosis service, or additional imaging.
If the Scan Is Inconclusive
Further assessment may be considered depending on your symptoms and medical history.
If the Scan Is Normal
That can be reassuring, but it does not necessarily rule out every form of endometriosis. Small or superficial lesions may not be visible on ultrasound.
What Happens After the Scan?
The ultrasound report is interpreted alongside your symptoms, medical history and clinical examination to guide your individual next steps.
What Happens After the Scan?
The ultrasound report is interpreted alongside your symptoms, medical history and clinical examination.
Depending on the findings, your doctor may recommend monitoring, treatment, referral to a specialist, further imaging such as MRI, or other investigations.
The next step is individual to each patient and may depend on factors such as symptoms, fertility goals, previous treatment, and the suspected location or extent of disease.
What Questions Should You Ask Your Doctor?
It may be helpful to ask:
- What did the ultrasound show about my uterus and ovaries?
- Was an endometrioma seen?
- Were there features that could suggest deep endometriosis?
- Were the ovaries mobile and in their expected positions?
- Was there any evidence suggesting adhesions?
- Were there any findings near the bowel or bladder that need further assessment?
- Would an MRI or another investigation be useful in my situation?
- What treatment or specialist referral may be appropriate?
- Could another condition also be contributing to my symptoms?
- If fertility is important to me, how should that be considered when discussing treatment?
When Should You Seek Medical Advice?
Persistent or worsening pelvic pain should not simply be dismissed as normal period pain, particularly when it affects daily activities.
Speak with a healthcare professional if pelvic pain is severe, persistent, worsening or interfering with normal life.
Urgent medical assessment may be required for sudden severe abdominal or pelvic pain, heavy bleeding, fainting, fever with significant pain, or other symptoms that feel medically urgent.
The Role of Specialised Ultrasound in Endometriosis Assessment
Deep endometriosis can be complex, and understanding where disease may be located is an important part of assessment and treatment planning.
A specialised pelvic ultrasound can provide useful information about the uterus, ovaries, endometriomas, pelvic organ mobility, possible adhesions and areas where deep disease may be present.
However, ultrasound is only one part of the diagnostic process.
The most meaningful interpretation comes from considering the scan together with the patient’s symptoms, medical history and clinical examination.
If you have been referred for a deep endometriosis ultrasound, follow the preparation instructions provided by your imaging service and speak with your referring doctor or imaging team if you have questions about the examination.
Frequently Asked Questions
Is a DIE Scan the Same as a Normal Pelvic Ultrasound?
No. A DIE scan is a specialised pelvic ultrasound designed to provide a more detailed assessment when deep endometriosis is suspected. It may include assessment of areas around the bowel and bladder, as well as pelvic organ position and mobility.
Can an Ultrasound Detect Endometriosis?
Ultrasound can identify some features associated with endometriosis, including ovarian endometriomas and certain forms of deep endometriosis. However, not all endometriosis is visible on ultrasound.
Does a Normal Ultrasound Rule Out Endometriosis?
No. A normal ultrasound does not necessarily mean that endometriosis is absent. Some small or superficial areas of disease may not be visible.
Is a DIE Ultrasound Performed Internally?
The examination may include a transvaginal ultrasound, depending on the clinical situation and examination protocol. An internal examination should be explained beforehand and performed with appropriate consent.
Do I Need to Prepare Before a DIE Scan?
Preparation depends on the examination protocol and the imaging provider. You may receive instructions about bowel preparation, food, fluids or bladder filling. Always follow the specific instructions provided for your appointment.
How Long Does a DIE Scan Take?
A specialised DIE scan typically takes approximately 30 to 40 minutes, although the actual duration may vary depending on the examination protocol and individual circumstances.
What Happens If the Scan Shows Possible Endometriosis?
Your doctor may discuss treatment, referral to a specialist, additional imaging or other investigations. The next step depends on your symptoms and individual circumstances.
What Happens If My Scan Is Normal but I Still Have Symptoms?
A normal scan does not exclude every form of endometriosis. If your symptoms continue, discuss them with the doctor who requested the examination so that the scan findings can be considered alongside your symptoms and medical history.
Have a Referral for a Specialised Pelvic Ultrasound?
If you have been referred for a deep endometriosis ultrasound, please follow the preparation instructions provided for your appointment and speak with your referring doctor or our imaging team in Tarneit if you have any questions.
Make an AppointmentThis article is intended for general education and should not replace individual medical advice, diagnosis or treatment. A qualified healthcare professional can advise which investigation and treatment approach is appropriate for your circumstances.