Endometriosis Excision Surgery in Singapore

Excision of Endometriosis

Endometriosis excision surgery removes visible endometriosis lesions while preserving healthy tissue where possible. Here is all you should know about the procedure, benefits, risks and recovery.

Overview

TreatmentExcision of Endometriosis
Also known asEndometriosis excision surgery, surgical excision of endometriosis
Used forEndometriosis causing pelvic pain, painful periods, pain during intercourse, endometriomas or other significant symptoms where surgery is appropriate
How it worksVisible endometriosis lesions are surgically cut out from affected tissues and organs while preserving healthy tissue where possible
AnaesthesiaGeneral anaesthesia
Surgical approachUsually performed using minimally invasive laparoscopic or robotic-assisted surgery; open surgery may be required in selected complex cases
Hospital stayVaries according to the extent and complexity of surgery and individual recovery
DowntimeUsually several weeks, depending on the extent of disease, surgery performed and individual recovery
Treatment courseUsually performed as a single surgical procedure followed by post-operative follow-up
Suitable forWomen with symptomatic or complex endometriosis for whom surgical removal of endometriosis lesions is considered appropriate after clinical assessment
Excision of endometriosis is a surgical procedure that removes visible endometriosis lesions from affected tissues while preserving healthy surrounding tissue where possible.

What is Excision of Endometriosis?

Endometriosis is a condition in which tissue similar to the lining of the uterus grows outside the uterus, commonly affecting structures within the pelvis. Excision of endometriosis is a surgical treatment in which visible endometriosis lesions are carefully cut out and removed from the affected tissues, while preserving healthy tissue and reproductive organs where possible.

Unlike ablation, which destroys endometriosis lesions using energy, excision physically removes the identified lesions and allows the removed tissue to be sent for histological examination when appropriate. Surgery can help manage endometriosis-related symptoms, but it does not guarantee that all symptoms will resolve permanently or that endometriosis will never recur.

Endometriosis is a condition in which tissue similar to the lining of the uterus grows outside the uterus, commonly affecting the ovaries, pelvic lining and other pelvic structures.
TREATMENT DECISIONS

When May Endometriosis Excision Surgery Be Recommended?

Not everyone with endometriosis requires surgery. Excision may be considered when symptoms are significant, medical treatment has not provided adequate relief, or the location and extent of the disease make surgical treatment appropriate.

Endometriosis excision surgery may be considered for women with:

  • Persistent or severe pelvic pain associated with endometriosis
  • Painful menstrual periods that significantly affect daily activities
  • Pain during sexual intercourse associated with endometriosis
  • Symptoms that continue despite appropriate medical treatment
  • Ovarian endometriomas that require surgical treatment
  • Deep endometriosis affecting pelvic tissues or organs
  • Endometriosis involving areas around the bowel, bladder or ureters
  • Fertility concerns where surgical treatment may be beneficial after individual assessment

The decision to proceed with surgery should take into account the severity of symptoms, location and extent of endometriosis, previous treatments, reproductive plans and individual preferences.

Excision vs Ablation of Endometriosis: What is the Difference?

Both excision and ablation can be used to surgically treat endometriosis, but they manage the lesions differently. Excision removes affected tissue, while ablation uses energy to destroy endometriosis lesions.

ExcisionAblation
How Lesions Are TreatedEndometriosis lesions are surgically cut outEnergy is used to destroy the lesions
Treatment of TissueThe affected tissue is physically removedThe lesion is destroyed without removing it in its entirety
Histological ExaminationRemoved tissue can be sent for laboratory examinationTissue may not be available for histological examination after destruction
SuitabilityMay be used for superficial, ovarian or deep endometriosis depending on the individual caseMay be considered for selected superficial lesions and, in some circumstances, ovarian endometriomas
Treatment DecisionSelected according to the type, depth and location of endometriosis and individual circumstancesSelected according to the type, depth and location of endometriosis and individual circumstances

Excision is not automatically superior to ablation for every form of endometriosis. The appropriate technique depends on the type and location of the lesions, ovarian reserve and fertility considerations, the structures involved and the goals of treatment.

THE PROCEDURE

How is Endometriosis Excision Surgery Performed?

Endometriosis excision is usually performed using minimally invasive surgery. The surgical approach depends on the location and extent of the disease, previous surgery and whether other pelvic organs are involved.

  • Laparoscopic Excision — small abdominal incisions are used to introduce a camera and specialised surgical instruments. The surgeon identifies and removes visible endometriosis lesions while preserving surrounding healthy tissue where possible.
  • Robotic-assisted Excision — the surgeon controls robotic instruments from a console while viewing the surgical area through magnified 3D visualisation. It is another minimally invasive approach that may be used for selected endometriosis procedures.
  • Open Surgery — a larger abdominal incision may be required in selected complex cases when minimally invasive surgery is not considered appropriate or safe.

What Happens During Endometriosis Excision Surgery?

Endometriosis excision is performed under general anaesthesia. The extent of the procedure varies according to where endometriosis is found and which tissues or organs are affected.

StageWhat Happens
Pre-operative PreparationYour medical history, investigations and medications are reviewed, and you receive instructions for preparing for surgery.
General AnaesthesiaAnaesthesia is administered so that you remain unconscious throughout the operation.
Surgical AccessSmall abdominal incisions are usually made to introduce a camera and surgical instruments.
Pelvic ExaminationThe surgeon systematically examines the pelvis and relevant organs to identify areas affected by endometriosis.
Identifying EndometriosisVisible endometriosis lesions and affected tissues are identified before treatment.
Excising the LesionsIdentified lesions are carefully cut out while preserving surrounding healthy structures where possible.
Treating Affected StructuresAdditional surgical treatment may be required if endometriosis involves the ovaries or other pelvic structures.
Recovery and MonitoringThe instruments are removed, incisions are closed and you are monitored as you recover from anaesthesia.

What Areas Can Endometriosis Excision Treat?

Endometriosis can affect different structures within the pelvis, so the extent of excision varies considerably between patients. Depending on where the disease is located, surgery may involve:

  • The pelvic peritoneum, which lines the pelvic cavity
  • The ovaries, including ovarian endometriomas
  • Tissues surrounding the uterus
  • The uterosacral ligaments that support the uterus
  • Areas involving or close to the bowel
  • Areas involving or close to the bladder or ureters
  • Other pelvic structures affected by endometriosis

Deep endometriosis involving the bowel, bladder, ureters or other organs requires careful surgical planning. Depending on the location and extent of disease, treatment may involve a multidisciplinary team with expertise in the affected organs.

PLANNING YOUR TREATMENT

What are the Benefits of Endometriosis Excision Surgery?

Endometriosis excision aims to remove visible areas of endometriosis while preserving healthy surrounding tissues where possible. For appropriately selected patients, potential benefits include:

  • Removal of Endometriosis Lesions — excision physically removes visible endometriosis lesions rather than destroying only the surface of the affected tissue.
  • Relief of Endometriosis-related Pain — surgery may reduce symptoms such as pelvic pain, painful periods and pain during sexual intercourse.
  • Treatment of Deep Endometriosis — excision allows deeper lesions affecting pelvic tissues or organs to be surgically removed where appropriate.
  • Histological Examination — tissue removed during excision can be sent for laboratory examination to confirm its microscopic features.
  • Preservation of Healthy Tissue — surgery aims to remove affected tissue while preserving healthy reproductive and pelvic structures wherever clinically possible.
  • Improved Quality of Life — reducing persistent pain and other endometriosis-related symptoms may improve daily functioning and overall quality of life.
  • Potential Fertility Benefits — in selected women with endometriosis-associated infertility, surgical treatment may improve the chance of spontaneous pregnancy.

The benefits vary according to the location and extent of endometriosis and individual patient factors. Excision does not guarantee complete or permanent symptom relief, and endometriosis or associated symptoms may persist or recur after surgery.

Who May Be Suitable for Endometriosis Excision Surgery?

Endometriosis excision surgery may be considered when symptoms are persistent or significantly affect daily life, particularly when medical treatment has not provided adequate relief. It may be appropriate for women with:

  • Persistent endometriosis symptoms despite appropriate medical treatment
  • Pelvic pain, painful periods or pain during intercourse that significantly affects daily activities
  • Ovarian endometriomas that require surgical treatment
  • Deep endometriosis affecting tissues beneath the surface of the pelvis
  • Endometriosis involving or affecting structures such as the bowel, bladder or ureters
  • Fertility concerns where surgical treatment of endometriosis is considered appropriate
  • Clinical circumstances where the expected benefits of removing endometriosis outweigh the potential risks of surgery

What Should You Consider Before Endometriosis Excision Surgery?

The decision to undergo endometriosis excision should take into account the extent of the disease, symptoms, reproductive plans and available alternatives. Important considerations include:

  • The severity, depth and location of endometriosis and how these factors may affect the extent of surgery.
  • The possibility that pelvic pain may have causes other than endometriosis and may not completely resolve after surgery.
  • Future pregnancy plans and how the proposed surgery may affect fertility.
  • The potential effect on ovarian reserve when surgery involves an ovarian endometrioma or ovarian tissue.
  • The possibility of more complex surgery when endometriosis affects the bowel, bladder, ureters or other pelvic structures.
  • Availability of medical treatment or other surgical approaches based on individual circumstances.
  • The possibility that endometriosis or associated symptoms may persist or recur after surgery.
  • Expected recovery and its potential impact on work and everyday activities.
  • The expected benefits of surgery in relation to its potential risks.

What are the Risks and Possible Complications of Endometriosis Excision Surgery?

As with any surgical procedure, endometriosis excision carries potential risks. These vary according to the location and extent of endometriosis, the organs involved and the complexity of the surgery.

  • Bleeding — bleeding can occur during or after surgery, with significant blood loss occasionally requiring additional treatment.
  • Infection — infection may develop at the incision sites, within the pelvis or in the urinary tract following surgery.
  • Blood Clots — surgery can increase the risk of blood clots developing in the legs or, less commonly, travelling to the lungs.
  • Anaesthetic Complications — general anaesthesia carries potential risks, which vary according to the patient's health and medical history.
  • Injury to Nearby Structures — surrounding organs, nerves or blood vessels may be injured during surgery, particularly when endometriosis is extensive or causes significant scarring.
  • Bowel, Bladder or Ureter Injury — these structures may be at greater risk when endometriosis involves or lies close to them.
  • Adhesion Formation — internal scar tissue may develop following pelvic surgery and can occasionally contribute to pain or other complications.
  • Reduced Ovarian Reserve — surgery involving an ovarian endometrioma may reduce the amount of healthy ovarian tissue or affect ovarian reserve.
  • Conversion to Open Surgery — minimally invasive surgery may occasionally need to be converted to open surgery when necessary to complete the procedure safely.
  • Persistent or Recurrent Symptoms — pain or other endometriosis-related symptoms may persist or return even after visible lesions have been removed.
  • Procedure-specific Complications — additional risks may arise when surgery involves organs such as the bowel, bladder or ureters, depending on the extent of treatment required.

How Should You Prepare for Endometriosis Excision Surgery?

Preparation for endometriosis excision surgery helps your surgical team assess the extent of the disease, plan the procedure and ensure you are medically ready for surgery. Depending on your individual circumstances, this may include:

  • Medical and Gynaecological Assessment — your symptoms, overall health, medical history and previous endometriosis treatments will be reviewed before surgery.
  • Pelvic Examination — a pelvic examination may be performed where appropriate to assess tenderness, pelvic anatomy and other findings associated with endometriosis.
  • Imaging Investigations — ultrasound, MRI or other imaging may be arranged to assess the location and extent of endometriosis and identify possible involvement of surrounding structures.
  • Pre-operative Tests — blood tests and other investigations may be required to assess your general health and readiness for surgery.
  • Medication Review — your medications and supplements will be reviewed, with instructions provided if any need to be adjusted or temporarily stopped.
  • Anaesthetic Assessment — your health and medical history will be assessed to determine your suitability for general anaesthesia.
  • Fasting Instructions — you will receive specific instructions about when to stop eating and drinking before the operation.
  • Fertility Discussion — future pregnancy plans may be discussed, particularly if endometriosis or the planned surgery involves the ovaries or other reproductive structures.
  • Discussion of the Planned Surgery — your surgeon will explain the anticipated extent of excision and whether additional procedures may be required if other pelvic organs are affected.
  • Informed Consent — the expected benefits, potential risks, treatment alternatives and possible extent of surgery will be discussed before you provide consent for the procedure.
RECOVERY AND FOLLOW-UP

What Can You Expect After Endometriosis Excision Surgery?

After surgery, you will be monitored as you recover from general anaesthesia. Some abdominal or pelvic discomfort is expected and can usually be managed with pain relief. You will generally be encouraged to start moving when it is safe to do so and gradually resume eating and drinking. If laparoscopic or robotic surgery was performed, you will also receive instructions on caring for the small abdominal incisions.

Discharge from hospital depends on the extent of surgery and how well you recover. Recovery following limited excision may be relatively straightforward, while extensive endometriosis involving the bowel, bladder, ureters or multiple pelvic structures can require a longer hospital stay and recovery period. Follow-up appointments are arranged to assess healing, review any histology results and discuss further management where required.

How Long Does Recovery Take After Endometriosis Excision Surgery?

There is no single recovery period for endometriosis excision because the extent of surgery can vary considerably. Recovery after uncomplicated minimally invasive surgery may take around 2 to 4 weeks, while more extensive surgery involving deep endometriosis or multiple pelvic organs may require a longer recovery.

Your general health, the amount of tissue removed, organs involved, surgical approach and any complications can all influence recovery. Returning to work also depends on the physical demands of your occupation, so activity should be increased gradually according to your surgeon's advice.

Can Endometriosis Return After Excision Surgery?

Yes. Excision removes endometriosis lesions identified during surgery, but it does not guarantee that endometriosis will never return. Some lesions may be difficult to identify or safely remove, and new or recurrent disease can occur over time.

Symptoms may also persist or recur after surgery, particularly because pelvic pain can have multiple causes. Depending on your symptoms, reproductive plans and individual risk of recurrence, ongoing medical treatment or further surgery may sometimes be required.

Can You Get Pregnant After Endometriosis Excision Surgery?

Yes, pregnancy may be possible after endometriosis excision because the uterus and reproductive organs are preserved where clinically possible. In selected women with endometriosis-associated infertility, surgery may improve the chance of spontaneous pregnancy, although the effect depends on factors such as age, extent of disease and other causes of infertility.

Pregnancy cannot be guaranteed after surgery. When endometriosis involves the ovaries, particularly ovarian endometriomas, surgery can also affect ovarian reserve. Fertility goals should therefore be discussed before surgery so that treatment can be planned with future pregnancy in mind.

Summary

Endometriosis excision surgery removes visible endometriosis lesions from affected tissues while preserving healthy tissue and reproductive organs where possible. Usually performed through minimally invasive laparoscopic or robotic-assisted surgery, excision may be considered for persistent pain, ovarian endometriomas, deep endometriosis or disease affecting surrounding pelvic structures when surgery is clinically appropriate.

For selected patients, it can reduce endometriosis-related symptoms and improve quality of life.

However, the outcome depends on the location and extent of disease, organs involved and individual circumstances, and surgery cannot guarantee permanent relief or prevent endometriosis from recurring.

Fertility goals, alternative treatments and the potential risks of surgery should therefore form part of treatment planning. If you are considering endometriosis excision surgery in Singapore, schedule a consultation with Dr Ma Li to discuss your symptoms, treatment options and whether surgical excision may be appropriate for you.

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Frequently Asked Questions (FAQs)

Is endometriosis excision a major surgery?

It can be, depending on the extent and location of endometriosis. Limited laparoscopic excision may be relatively straightforward, while deep endometriosis involving multiple organs can require complex surgery.

The duration varies considerably according to the amount and location of endometriosis and whether other pelvic organs require treatment. More extensive or complex disease generally requires a longer operation.

Some patients undergoing uncomplicated minimally invasive surgery may be discharged the same day or after an overnight stay. More extensive surgery may require several days in hospital.

This depends on the extent of surgery, your recovery and the nature of your work. Patients with physically demanding jobs may require more time away from work than those returning to less strenuous activities.

Gentle walking is generally encouraged during early recovery, while strenuous exercise and heavy lifting should be avoided initially. Your surgeon will advise when you can safely increase your activity.

The appropriate timing depends on the extent and location of surgery and how well you are healing. Your surgeon can advise when vaginal intercourse can be safely resumed during follow-up.

Possibly. Hormonal treatment may be recommended after surgery for some women to manage symptoms or reduce the risk of recurrence, particularly when pregnancy is not being attempted immediately.

Yes, repeat surgery may sometimes be considered if endometriosis or significant symptoms recur. However, the benefits and risks of further surgery, including possible effects on fertility and ovarian reserve, should be assessed carefully.

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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