URINARY TRACT ENDOMETRIOSIS

Surgery for Ureter & Bladder Endometriosis.

Ureter and bladder endometriosis surgery treats endometriosis affecting the urinary tract, helping relieve symptoms and manage complications such as ureteric obstruction.

Overview

TreatmentSurgery for Ureter & Bladder Endometriosis
Used forEndometriosis affecting the bladder or ureters, particularly when it causes significant symptoms, urinary obstruction or risks affecting kidney function
How it worksRemoves endometriosis affecting the urinary tract and, where necessary, repairs or reconstructs the bladder or ureter to maintain urinary function
AnaesthesiaGeneral anaesthesia
Surgical approachLaparoscopic, robotic-assisted or open surgery, depending on the location and complexity of the disease
ProceduresBladder excision, partial cystectomy, ureterolysis, ureteric resection and reconnection, or ureteric reimplantation, as clinically appropriate
Hospital stayVaries according to the extent of surgery, urinary tract involvement and individual recovery
RecoveryDepends on the procedure performed, extent of endometriosis and whether bladder or ureteric reconstruction is required
Treatment courseUsually performed as a single surgical procedure, followed by post-operative monitoring and follow-up
Suitable forPatients with bladder or ureteric endometriosis for whom surgical treatment is considered appropriate after specialist assessment

What is Ureter and Bladder Endometriosis?

Ureter and bladder endometriosis are forms of urinary tract endometriosis, where endometriosis affects structures involved in storing or transporting urine. Bladder endometriosis typically involves the bladder wall, while ureteric endometriosis affects one or both ureters, the tubes that carry urine from the kidneys to the bladder.

Ureteric endometriosis may develop around the outside of the ureter, where fibrosis and scarring can compress it or infiltrate the ureteric wall itself. This can cause narrowing or obstruction and interfere with the flow of urine from the kidney to the bladder, potentially affecting kidney function if left untreated. Importantly, ureteric obstruction can sometimes develop with few or no noticeable urinary symptoms.

Ureter and bladder endometriosis occurs when endometriosis affects the bladder wall or ureters, potentially causing urinary symptoms, ureteric obstruction and impaired urine drainage from the kidneys.
UNDERSTANDING THE CONDITION

What Symptoms Can Ureter and Bladder Endometriosis Cause?

Ureter and bladder endometriosis can cause pelvic or bladder pain due to inflammation and deep endometriotic lesions affecting the urinary tract and surrounding pelvic tissues.

Symptoms depend on whether endometriosis affects the bladder, ureters or other pelvic structures at the same time. Some symptoms may become more noticeable around menstruation.

Bladder-related symptoms may include:

  • Pain or discomfort during urination
  • Increased urinary frequency or urgency
  • Pelvic or bladder pain
  • Blood in the urine in some cases
  • Urinary symptoms that worsen around menstruation

Ureter-related symptoms may include:

  • Flank or lower back pain in some patients
  • Pelvic pain associated with endometriosis
  • Symptoms caused by endometriosis elsewhere in the pelvis
  • Reduced kidney function when significant obstruction interferes with urinary drainage
  • Few or no noticeable urinary symptoms despite ureteric involvement

These symptoms are not specific to endometriosis and can occur with other urinary or gynaecological conditions. Proper assessment is therefore important to identify their underlying cause.

How is Ureter and Bladder Endometriosis Diagnosed?

Diagnosis begins with a detailed medical and gynaecological history, including urinary symptoms, pelvic pain and whether symptoms change during the menstrual cycle. A pelvic examination may also be performed where clinically appropriate.

Specialist ultrasound can help identify deep endometriosis and assess possible involvement of the bladder or ureters. When ureteric disease is suspected, the kidneys and urinary tract may also be evaluated for impaired urine drainage, including hydroureter or hydronephrosis. MRI may be used to map deep endometriosis and determine its relationship with the bladder, ureters and surrounding pelvic structures. Kidney function may also be assessed when ureteric obstruction is suspected.

Cystoscopy, which uses a small camera to examine the inside of the bladder, may be performed in selected cases but is not required for every patient. Investigations are used not only to establish the location and extent of endometriosis, but also to determine whether urinary drainage or kidney function has been affected.

When May Surgery for Ureter and Bladder Endometriosis Be Recommended?

Not everyone with urinary tract endometriosis requires surgery. Treatment is individualised according to symptoms, the extent of disease and whether the urinary tract or kidney function is at risk. Surgery may be considered for women who:

  • Experience significant bladder, urinary or pelvic symptoms associated with deep endometriosis
  • Develop ureteric narrowing or obstruction caused by endometriosis
  • Have hydroureter or hydronephrosis due to impaired urine drainage
  • Show evidence that ureteric obstruction is placing kidney function at risk
  • Have deep bladder endometriosis requiring surgical removal
  • Have extensive endometriosis involving the urinary tract and other pelvic structures
  • Continue to experience significant symptoms despite appropriate conservative treatment
  • Are considered likely to benefit from surgery after its potential benefits and risks have been assessed

Ureteric endometriosis requires particular attention because obstruction can sometimes progress without prominent symptoms. In these cases, preserving urinary drainage and protecting kidney function may become an important reason for surgical intervention.

THE PROCEDURE

What Types of Surgery are Used for Bladder Endometriosis?

The type of surgery depends on the size, depth and location of the bladder lesion and its relationship with nearby structures, particularly where the ureters enter the bladder.

  • Bladder Endometriosis Excision — Bladder endometriosis excision involves removing endometriotic tissue affecting the bladder while preserving healthy bladder tissue where possible. The extent of surgery depends on how deeply the disease has infiltrated the bladder wall.
  • Partial Cystectomy — A partial cystectomy may be required when endometriosis deeply infiltrates the bladder wall. The affected portion of the bladder wall is removed and the remaining bladder is repaired, while preserving as much healthy bladder tissue as possible.

The appropriate technique is selected according to the depth and extent of bladder involvement, the location and size of the lesion, and its proximity to the ureteric openings.

What Types of Surgery are Used for Ureteric Endometriosis?

Surgery for ureteric endometriosis aims to remove or release disease affecting the ureter, relieve obstruction and preserve urine drainage from the kidney where possible. The procedure required depends on whether endometriosis surrounds or infiltrates the ureter and the location and extent of the affected segment.

  • Ureterolysis — Ureterolysis involves carefully freeing the ureter from surrounding endometriosis, fibrosis and adhesions. It may be appropriate when disease mainly surrounds and compresses the ureter and the affected ureter can be safely preserved.
  • Ureterectomy and Ureteroureterostomy — When a localised section of the ureter is significantly affected, the diseased segment may be removed. The healthy ends of the ureter are then reconnected to restore the pathway for urine to drain towards the bladder.
  • Ureteric Reimplantation — When significant disease affects the lower ureter near the bladder, the affected section may be removed and the healthy ureter reimplanted into the bladder. This creates a new connection through which urine can drain from the kidney into the bladder.

There is no single surgical technique that is suitable for every patient with ureteric endometriosis. The procedure is selected according to the location and extent of disease, severity and length of ureteric narrowing, degree of obstruction, and the condition of the affected ureter and kidney.

How is Ureter and Bladder Endometriosis Surgery Performed?

Surgery is usually performed using a minimally invasive approach, although the method depends on the location and extent of endometriosis, the urinary structures affected and whether repair or reconstruction is required.

  • Laparoscopic Surgery — small abdominal incisions are used to insert a camera and specialised instruments, allowing the surgeon to identify and remove endometriosis affecting the bladder, ureters and surrounding pelvic structures.
  • Robotic-assisted Surgery — the surgeon controls robotic instruments through small incisions while viewing the surgical area with magnified 3D visualisation. This approach may be used for selected complex procedures requiring careful dissection or reconstruction.
  • Open Surgery — a larger abdominal incision may occasionally be necessary for extensive disease, complex urinary tract reconstruction or when minimally invasive surgery cannot be completed safely.

When endometriosis significantly affects the ureters or bladder, multidisciplinary surgical planning with a urologist may be required.

What Happens During Ureter and Bladder Endometriosis Surgery?

The exact procedure varies according to the structures affected and the extent of disease. Surgery is performed under general anaesthesia and may include treatment of endometriosis elsewhere in the pelvis.

StageWhat Happens
Pre-operative PreparationYour medical history, imaging, urinary tract assessment and planned surgical procedure are reviewed.
General AnaesthesiaAnaesthesia is administered so that you remain unconscious throughout the operation.
Surgical AccessThe abdomen and pelvis are accessed using the planned surgical approach.
Assessment of DiseaseThe bladder, ureters and surrounding pelvic structures are carefully examined.
Identification of EndometriosisThe location, depth and extent of urinary tract involvement are assessed.
Removal of EndometriosisEndometriosis affecting the bladder or ureters is carefully excised where appropriate.
Repair or ReconstructionBladder repair, ureteric reconstruction or ureteric reimplantation may be performed when required.
Completion and RecoveryThe operation is completed, surgical sites are closed and post-operative monitoring begins.
PLANNING YOUR TREATMENT

What are the Benefits of Ureter and Bladder Endometriosis Surgery?

Surgery aims to remove urinary tract endometriosis, relieve associated symptoms and, where ureteric obstruction is present, restore urinary drainage and protect kidney function. Potential benefits include:

  • Removal of Urinary Tract Endometriosis — surgery removes identified endometriosis affecting the bladder or ureters while preserving healthy tissue where possible.
  • Relief of Urinary Symptoms — bladder-related symptoms such as painful urination, urgency and frequency may improve after appropriate treatment.
  • Relief of Endometriosis-related Pain — removing deep endometriosis may reduce pelvic pain and other pain associated with the disease.
  • Restoration of Urinary Drainage — relieving ureteric compression or obstruction can restore the passage of urine from the kidney towards the bladder.
  • Protection of Kidney Function — treating significant ureteric obstruction can help prevent ongoing damage caused by impaired urinary drainage.
  • Treatment of Extensive Pelvic Disease — endometriosis affecting the urinary tract and other pelvic structures may be treated during the same operation where appropriate.
  • Preservation of Urinary Structures — surgery aims to preserve the bladder and ureters wherever this can be achieved safely while adequately treating the disease.
  • Improved Quality of Life — reducing significant pain and urinary symptoms may improve everyday functioning and overall quality of life.

Outcomes depend on the severity and location of disease and the procedure required. Surgery cannot guarantee complete or permanent symptom relief, and endometriosis may persist or recur.

What Should You Consider Before Ureter and Bladder Endometriosis Surgery?

The extent of urinary tract involvement can vary considerably, so careful assessment is needed before deciding on surgery. Important considerations include:

  • Location and Extent of Disease — the location, depth and extent of endometriosis help determine the type of surgery required.
  • Bladder Involvement — the depth of bladder wall infiltration and proximity of lesions to the ureteric openings can influence surgical planning.
  • Ureteric Narrowing — the location, length and severity of ureteric narrowing help determine whether ureterolysis or reconstruction may be required.
  • Kidney and Urinary Function — urinary drainage and kidney function may need to be assessed when ureteric obstruction is suspected.
  • Possible Bladder Repair — deeper bladder disease may require removal of part of the affected bladder wall followed by surgical repair.
  • Possible Ureteric Reconstruction — significant ureteric disease may require removal and reconnection of the affected segment or reimplantation into the bladder.
  • Temporary Urinary Devices — a urinary catheter or ureteric stent may be required temporarily depending on the procedure performed.
  • Other Pelvic Endometriosis — disease involving the ovaries, bowel or other pelvic structures may need to be addressed during the same operation.
  • Fertility Plans — future pregnancy goals should be considered when planning treatment for extensive pelvic endometriosis.
  • Possibility of Recurrence — endometriosis and associated symptoms can persist or recur following surgery.
  • Multidisciplinary Care — a urologist or other surgical specialist may be involved when complex urinary tract disease is anticipated.
  • Benefits and Risks — the expected benefits of treatment should be considered alongside the potential risks and complexity of the planned procedure.

What are the Risks and Possible Complications of Ureter & Bladder Endometriosis Surgery?

The risks of surgery depend considerably on the extent of endometriosis and whether the procedure involves limited excision, partial cystectomy or ureteric reconstruction. Potential complications include:

  • Bleeding — bleeding may occur during or after surgery and occasionally requires additional treatment.
  • Infection — infection may develop in the urinary tract, surgical wounds or pelvis following surgery.
  • Blood Clots — pelvic surgery can increase the risk of blood clots developing in the legs or travelling to the lungs.
  • Anaesthetic Complications — general anaesthesia carries potential risks that vary according to your overall health.
  • Bladder Leakage — leakage can occur from an area of the bladder that has been excised and repaired.
  • Ureteric Injury or Leakage — the ureter may be injured during complex surgery, or leakage may occur following ureteric repair or reconstruction.
  • Ureteric Stricture — narrowing of the ureter can develop following healing and may interfere with urinary drainage.
  • Urinary Tract Infection — infection can occur following urinary tract surgery or temporary catheter or stent placement.
  • Temporary Bladder Dysfunction — some patients may experience temporary difficulty emptying the bladder following extensive pelvic surgery.
  • Injury to Nearby Structures — surrounding pelvic organs, nerves or blood vessels may be injured during complex dissection.
  • Urinary Catheter or Ureteric Stent — temporary placement may be necessary to support healing and urinary drainage after certain procedures.
  • Adhesion Formation — internal scar tissue can develop as part of the healing process after pelvic surgery.
  • Conversion to Open Surgery — minimally invasive surgery may occasionally need to be converted to open surgery for safe completion.
  • Persistent or Recurrent Symptoms — endometriosis-related symptoms may persist or return despite surgical treatment.

How Should You Prepare for Ureter and Bladder Endometriosis Surgery?

Preparation helps determine the extent of urinary tract involvement, plan the appropriate procedure and ensure you are medically ready for surgery. Depending on your individual circumstances, this may include:

  • Medical and Gynaecological Assessment — your symptoms, general health, medical history and previous endometriosis treatments will be reviewed.
  • Review of Urinary Symptoms — urinary frequency, urgency, painful urination, flank pain and other relevant symptoms will be assessed.
  • Imaging Investigations — specialist ultrasound, MRI or other imaging may be used to map deep endometriosis and assess the urinary tract.
  • Kidney and Urinary Tract Assessment — kidney function and urinary drainage may be evaluated when ureteric involvement or obstruction is suspected.
  • Pre-operative Tests — blood tests and other investigations may be arranged to assess your general health before surgery.
  • Medication Review — current medications and supplements will be reviewed, with instructions provided if any need to be adjusted or temporarily stopped.
  • Anaesthetic Assessment — your medical history and general health will be assessed before general anaesthesia.
  • Surgical Planning — the anticipated extent of excision, bladder repair or ureteric reconstruction will be discussed before surgery.
  • Urological Assessment — a urologist may be involved in assessment and surgical planning when significant urinary tract involvement is anticipated.
  • Fertility Discussion — future pregnancy plans may be considered when other reproductive structures are affected by endometriosis.
  • Fasting Instructions — you will receive instructions about when to stop eating and drinking before surgery.
  • Informed Consent — the planned procedure, possible additional surgery, potential benefits, risks and alternatives will be discussed before you provide consent.
RECOVERY AND FOLLOW-UP

What Can You Expect After Ureter and Bladder Endometriosis Surgery?

After surgery, you will be monitored as you recover from general anaesthesia and provided with appropriate pain relief. You will usually be encouraged to begin moving when safe and gradually resume eating and drinking. Your healthcare team will monitor urine output and bladder function, assess your incisions and provide guidance on wound care and activity before discharge.

Depending on the operation, a urinary catheter may remain temporarily while the bladder heals, or a ureteric stent may be used to maintain urine drainage while the ureter recovers. Recovery after limited excision can differ substantially from recovery following partial cystectomy or ureteric reconstruction, and follow-up will be arranged according to the procedure performed.

How Long Does Recovery Take After Ureter and Bladder Endometriosis Surgery?

There is no single recovery period for urinary tract endometriosis surgery. Recovery depends on whether the procedure involves limited excision, partial cystectomy, ureterolysis or more extensive ureteric reconstruction, as well as the extent of endometriosis treated elsewhere in the pelvis.

The surgical approach, general health and any complications can also influence recovery. Returning to work and normal activities depends on the extent of surgery and the physical demands of your occupation, so activity should be increased gradually according to your surgeon's advice.

Will You Need a Urinary Catheter or Ureteric Stent After Surgery?

A urinary catheter and a ureteric stent perform different functions. A urinary catheter passes into the bladder to drain urine while the bladder recovers, whereas a ureteric stent is a thin internal tube placed within the ureter to maintain urine flow from the kidney to the bladder.

Either may be used temporarily depending on the surgery performed. For example, a catheter may be required after bladder repair, while a ureteric stent may be used following certain ureteric procedures. They are not necessary for every patient, and your surgeon will explain if either is expected as part of your treatment.

Can Ureter or Bladder Endometriosis Return After Surgery?

Surgery removes the urinary tract endometriosis identified and treated during the operation, but it does not guarantee a permanent cure. Endometriosis can persist or recur, and symptoms may return over time.

Ongoing management depends on the extent of disease, symptoms, reproductive plans and other areas of endometriosis. Follow-up may therefore include monitoring, medical treatment or, less commonly, further surgery where clinically necessary.

Can You Get Pregnant After Ureter or Bladder Endometriosis Surgery?

Pregnancy may remain possible after urinary tract endometriosis surgery because the reproductive organs are preserved where clinically possible. Surgery involving the bladder or ureters does not itself remove the uterus or ovaries.

However, fertility depends on factors beyond urinary tract involvement, including age, ovarian reserve, fallopian tube function and endometriosis affecting other reproductive structures. Surgery cannot guarantee pregnancy, and some women may require additional fertility treatment.

Summary

Ureter and bladder endometriosis occurs when endometriosis affects the urinary tract, with bladder disease involving the bladder wall and ureteric disease affecting the tubes that carry urine from the kidneys. Surgery may be considered for significant symptoms, deep bladder lesions or ureteric obstruction that interferes with urinary drainage or threatens kidney function.

Depending on the disease, treatment may range from bladder endometriosis excision or partial cystectomy to ureterolysis, ureteric reconstruction or reimplantation. Treatment is carefully planned according to the location and extent of disease, urinary tract function and involvement of other pelvic structures, with urological expertise incorporated where required.

Although surgery can remove disease, relieve symptoms and restore urinary drainage, endometriosis may persist or recur and outcomes vary between patients.

If you have been diagnosed with ureter or bladder endometriosis, consider scheduling a consultation with Dr Ma Li to discuss your condition, treatment options and the surgical approach most appropriate for your needs.

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Frequently Asked Questions (FAQs)

Is bladder endometriosis the same as a urinary tract infection?

No. Bladder endometriosis involves endometriosis affecting the bladder, while a urinary tract infection is caused by infection within the urinary system. Some symptoms, such as painful or frequent urination, can overlap.

Yes. Significant ureteric narrowing can obstruct urine drainage from the kidney, causing hydronephrosis and potentially reducing kidney function if the obstruction persists.

Yes. Some patients have few or no urinary symptoms despite significant ureteric narrowing or obstruction, which is why appropriate urinary tract assessment can be important when ureteric disease is suspected.

No. The operation depends on the depth and location of disease. Partial cystectomy may be required for deep bladder wall involvement, but the appropriate procedure is determined individually.

A urologist may be involved when significant bladder or ureteric disease requires specialised urinary tract treatment or reconstruction. This is determined during pre-operative planning.

Operating time varies considerably according to the extent of endometriosis and whether bladder repair, ureterolysis or urinary tract reconstruction is required. Your surgeon can provide a more individual estimate after assessment.

Hospital stay depends on the procedure performed and your recovery. More extensive bladder or ureteric reconstruction may require a longer stay than limited minimally invasive excision.

This depends on the extent of surgery, your individual recovery and the physical demands of your work. Your surgical team will advise when it is appropriate to resume work and normal activities.

Dr Ma Li

MD | MRCOG (UK) | FACOG (USA) | FAMS (SINGAPORE)
OBSTETRICS & GYNAECOLOGY (O&G)

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This article has been medically reviewed by Dr. Ma Li
Dr Ma Li is an internationally recognised gynaecologist specialising in endometriosis and minimally invasive surgery, including robot-assisted procedures. She led the Endometriosis Service at NUH from 2015–2024 and has extensive experience managing complex cases, including stage IV endometriosis.

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