Endometriosis Surgery

What is Endometriosis Surgery?

Endometriosis surgery is a procedure performed to remove or destroy endometriosis tissue that is growing outside the uterus. Endometriosis occurs when tissue similar to the lining of the uterus (the endometrium) grows on structures such as the ovaries, fallopian tubes, bowel, bladder, or the lining of the pelvis. 

In most cases, surgery is performed using minimally invasive techniques, such as laparoscopy (keyhole surgery). A small camera is inserted through tiny incisions in the abdomen, allowing the surgeon to see and treat the disease precisely. In more complex cases, robotic-assisted laparoscopy or, rarely, open surgery may be required.

Who is Suitable for Endometriosis Surgery?

Surgery is not required for every person diagnosed with endometriosis. Many patients can manage symptoms with hormonal therapy or pain management. However, surgery may be appropriate in the following situations:

• Severe or persistent pelvic pain: When pain significantly affects daily activities, work, sleep, or relationships despite medical treatment.
• Infertility associated with endometriosis: Particularly if the ovaries or fallopian tubes are involved.
• Endometriomas (ovarian cysts): Especially if they are large, painful, or affecting ovarian function.
• Deep infiltrating endometriosis: When disease involves the bowel, bladder, ureters, or nerves.
• Diagnostic uncertainty: When imaging is inconclusive, and symptoms are severe.
• Failure of hormonal treatment: When medications are not effective or cannot be tolerated due to side effects.

Benefits of Endometriosis Surgery

The benefits of surgery vary depending on the severity and location of the disease, but may include:

• Significant pain relief: Many patients experience improvement in period pain, pelvic pain, and pain during intercourse.
• Improved fertility outcomes: Removing disease and restoring normal anatomy may increase the chance of natural conception or improve IVF success rates.
• Improved organ function: Treatment of bowel or bladder involvement can reduce symptoms such as painful bowel motions or urinary issues.
• Reduced inflammation: Removing lesions can decrease ongoing pelvic inflammation.
• Enhanced quality of life: Better physical comfort often leads to improved emotional well-being and daily functioning.

It is important to understand that endometriosis can recur. Surgery reduces disease burden but does not permanently cure the condition. Ongoing management may still be required.

Types of Endometriosis Surgery

The type of surgery recommended depends on disease severity, location, and individual goals.

Laparoscopic Excision Surgery

This is considered the gold standard for treating endometriosis. The surgeon carefully cuts out (excises) visible endometriosis tissue.

• Precise removal: Allows complete removal of lesions where possible.
• Lower recurrence compared to ablation: Excision removes deeper disease.
• Minimally invasive: Small incisions and typically quicker recovery.

Laparoscopic Ablation (Diathermy or Laser)

Instead of cutting out tissue, the surgeon destroys it using heat or laser energy.

• May be suitable for superficial disease.
• Shorter operating time in some cases.
• Higher risk of recurrence compared to excision for deeper disease.

Surgery for Ovarian Endometriomas

Ovarian cysts caused by endometriosis may require:

• Cystectomy: Removal of the cyst wall while preserving healthy ovarian tissue.
• Drainage and ablation: Used selectively but associated with higher recurrence.

Surgery for Deep Infiltrating Endometriosis

When endometriosis affects the bowel, bladder, or ureters, more complex surgery may be required. Dr Wong would refer you to an endometriosis specialist for this type of surgery. This can involve:

• Bowel shaving or segmental resection.
• Bladder repair.
• Multidisciplinary team involvement (colorectal or urological surgeons).

Hysterectomy (With or Without Ovarian Removal)

In severe cases where childbearing is complete, and symptoms are persistent:

• Removal of the uterus may reduce pain.
• Removal of ovaries reduces hormone stimulation of the disease.

However, hysterectomy is not a guaranteed cure, especially if endometriosis remains elsewhere in the pelvis. Dr Wong would refer you to a hysterectomy specialist for this type of surgery.

Alternative Options to Endometriosis Surgery

Not every patient requires surgery. Alternative or complementary options include:

Hormonal Treatments

• Oral contraceptive pills.
• Progestin therapy.
• Hormonal IUD (e.g., levonorgestrel-releasing device).
• GnRH analogues.

These treatments reduce oestrogen stimulation, which helps suppress endometriosis growth and inflammation.

Pain Management

• Anti-inflammatory medications (NSAIDs).
• Neuropathic pain medications.
• Pelvic physiotherapy.

Lifestyle and Supportive Therapies

• Exercise and physiotherapy
• Dietary modification
• Psychological support

Assisted Reproductive Techniques

If fertility is the primary concern, options such as:

• Ovulation induction.
• Intrauterine insemination (IUI).
• In vitro fertilisation (IVF).

may be considered, sometimes instead of or in addition to surgery.

What to Do Before Endometriosis Surgery?

Careful preparation before surgery improves safety, reduces complications, and supports recovery. Your specialist will provide personalised instructions, but general guidance includes:

• Comprehensive consultation: Your doctor will review your symptoms, medical history, fertility goals, previous treatments, and imaging results (such as ultrasound or MRI). The aim is to confirm the diagnosis, map the disease, and discuss surgical goals.
• Pre-operative investigations: Blood tests may be required to assess haemoglobin levels and overall health status. If bowel or bladder involvement is suspected, additional imaging may be organised. In complex cases, other specialists (such as colorectal or urological surgeons) may be involved in planning.
• Medication review: Some medications, particularly blood thinners or certain supplements, may need to be stopped before surgery. Hormonal therapy may be continued or paused depending on the treatment plan.
• Fasting instructions: You will usually need to fast (no food or drink) for several hours before surgery, especially if a general anaesthetic is planned.
• Bowel preparation (if required): In cases where bowel surgery is anticipated, special preparation may be advised.
• Lifestyle optimisation:
• Stop smoking: Smoking increases surgical risks and delays healing.
• Optimise nutrition: Adequate iron levels and balanced nutrition support recovery.
• Arrange support: Plan time off work and ensure someone is available to assist you at home in the first few days.
• Discussion of fertility plans: If you are planning a pregnancy, this should be clearly discussed before surgery. Surgical technique may be tailored to protect ovarian reserve.

Clear communication before surgery ensures realistic expectations and shared decision-making.

Endometriosis Surgery Procedure

Most endometriosis surgery is performed using minimally invasive techniques, typically laparoscopy (keyhole surgery), under general anaesthesia.

• Anaesthesia: You will be asleep and pain-free during the procedure.
• Small incisions: Several small cuts (usually 0.5–1 cm) are made in the abdomen. A camera (laparoscope) is inserted to allow detailed visualisation of the pelvis.
• Assessment of disease extent: The surgeon carefully examines the uterus, ovaries, fallopian tubes, bowel, bladder, and pelvic lining to identify endometriosis lesions and adhesions.
• Removal of disease:
• Excision: Lesions are cut out precisely.
• Ablation: Superficial lesions may be destroyed using heat or a laser.
• Adhesiolysis: Scar tissue is released to restore normal anatomy.
• Endometrioma removal: Ovarian cysts may be carefully excised.
• Advanced procedures: If deep infiltrating endometriosis affects the bowel or bladder, specialised surgical techniques may be required.
• Completion and closure: After treatment, instruments are removed, and incisions are closed with dissolvable sutures.

Surgery duration varies depending on disease severity. It may take 1–2 hours for mild cases and longer for complex diseases.

What to Expect After Endometriosis Surgery?

Recovery depends on the extent of surgery performed.

Immediate Recovery

• Recovery room monitoring: You will wake up in the recovery room and be monitored until you are stable.
• Mild abdominal discomfort: This is common and usually managed with pain medication.
• Shoulder tip pain: Caused by gas used during laparoscopy; it typically resolves within a few days.
• Nausea or fatigue: Temporary effects of anaesthesia.

Many patients go home the same day or within 24 hours.

Short-Term Recovery (First 1–3 Weeks)

• Light activity encouraged: Gentle walking promotes circulation and reduces blood clot risk.
• Avoid heavy lifting: Usually for 2–4 weeks.
• Vaginal bleeding or spotting: Mild bleeding may occur for a few days.
• Return to work: Often within 1–2 weeks for desk-based roles; longer for physically demanding jobs.
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Longer-Term Recovery

• Improvement in pain: Many patients notice a gradual reduction in pelvic pain over weeks to months.
• Menstrual changes: Periods may become less painful.
• Fertility considerations: If pregnancy is desired, timing should be discussed with Dr Wong.

Follow-up appointments are important for reviewing histology results, assessing recovery, and planning ongoing management.

Endometriosis Surgery Prognosis

The postoperative prognosis depends on disease severity, surgical technique, and individual health factors.

• Pain relief: Studies suggest 60–80% of patients experience meaningful pain improvement after excision surgery.
• Fertility outcomes: In mild to moderate disease, natural conception rates may improve. In more advanced cases, surgery may enhance IVF success.
• Recurrence: Endometriosis can recur, particularly in younger patients or if ovarian function remains active. Recurrence rates vary but may range between 20–40% over several years.

Long-term management may include hormonal therapy to suppress recurrence, especially if pregnancy is not immediately planned.

Surgery is a treatment tool—not a permanent cure—but it can significantly improve quality of life.

Endometriosis Surgery Risks

All surgical procedures carry risks. While most patients recover without complications, potential risks include:

• Bleeding
• Infection
• Damage to nearby organs
• Adhesion formation
• Reduced ovarian reserve
• Recurrence of symptoms
• Anaesthetic risks
• Laparotomy open surgery

Risk level varies depending on disease complexity and individual health status. Choosing an experienced surgical team reduces complications.

What if Endometriosis Surgery is Delayed?

Delaying surgery may be appropriate in some cases, particularly if symptoms are mild and controlled with medical therapy. However, postponement may lead to:

• Progression of disease
• Increased scar tissue formation
• Worsening pain
• Fertility impact
• Psychological burden

That said, surgery is not always urgent. Decisions should balance symptom severity, reproductive goals, and response to medical therapy.