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Endometriosis surgery: excision, deep disease and ovary-sparing techniques

Dr. Senai Aksoy · · 14 min read
Medically reviewed on 18 July 2026 - Dr. Senai Aksoy
endometriosissurgeryexcisiondieshavingrecurrenceovarian preservation
Endometriosis surgery: excision, deep disease and ovary-sparing techniques

Key Takeaways

For superficial endometriosis lesions, excision is preferred over thermal ablation (Pundir 2017, Healey 2014). Deep infiltrating endometriosis (rectum, sigmoid, ureters, bladder) should be managed in expert centres with multidisciplinary teams; bowel-sparing techniques (shaving, discoid excision) have markedly fewer complications than segmental resection (Bendifallah 2020). Recurrence is estimated at 21.5 % at 2 years and 40–50 % at 5 years without post-operative medical therapy and is significantly reduced by maintenance hormonal treatment.

Key evidence: ESHRE guideline: endometriosis (2022) Bendifallah et al. 2020 — bowel-sparing techniques meta-analysis

On this page

Why operate — and why not routinely

Short Answer:

Surgery is no longer routine or mandatory in endometriosis — it stays essential for refractory pain, deep infiltrating disease, symptomatic endometrioma, selected infertility cases, and severe adhesions, not as a default diagnostic step.

That shift is reflected in the ESHRE 2022 guideline (Becker et al., Human Reproduction Open), which narrowed routine indications in favour of a medical and imaging-led approach. Surgery still has an essential role, though, in several situations:

Conversely, surgery should no longer be:

This article details current techniques. For the overview, see the complete endometriosis guide.

Superficial lesions: excision over ablation

Short Answer:

For superficial peritoneal lesions, excision (removing the lesion) is now generally preferred over ablation (thermal destruction), with randomised evidence showing better long-term pain and quality-of-life outcomes.

Two approaches exist for these lesions: excision (complete removal of the lesion with its peritoneal support) or ablation (thermal destruction by monopolar, bipolar, plasma or laser energy). Excision is now the preferred option where surgical expertise allows.

The evidence

The biological rationale

Excision offers several biological advantages over ablation:

The limitation remains operator expertise: excision is technically more demanding and must be performed by a trained surgeon.

Deep endometriosis: multidisciplinary team

Short Answer:

Deep infiltrating endometriosis — lesions penetrating more than 5 mm into an organ wall — should be managed in expert centres with a multidisciplinary team and dedicated pre-operative imaging, not by a single gynaecological surgeon alone.

Deep infiltrating endometriosis (DIE) is defined as lesions infiltrating the muscular layer of an organ (rectum, sigmoid, bladder, ureter, vagina, recto-vaginal septum) by more than 5 mm.

DIE is best managed in expert centres offering:

The pre-operative workup routinely includes a digestive assessment (recto-sigmoidoscopy or colo-MRI), a urological assessment (uro-MRI, ureteroscopy as indicated), and a functional workup as appropriate.

Bowel-sparing techniques

Short Answer:

For rectal or sigmoid involvement, shaving — the most conservative option — has significantly fewer complications than discoid excision or segmental resection and is preferred wherever anatomy allows.

Three techniques are used for rectal and sigmoid disease:

Shaving

Superficial excision of the lesion without opening the bowel lumen. The most conservative technique.

Discoid excision

Excision of a disc comprising the full thickness of the bowel wall, followed by transverse suture. Moderately invasive.

Segmental resection

Resection of a bowel segment with end-to-end anastomosis. The most invasive — reserved for extensive, circumferential or multifocal involvement.

Comparative evidence

The Bendifallah et al., 2020 meta-analysis (60 studies) shows that shaving has significantly fewer complications than the more invasive techniques:

Pain relief is broadly similar across all three techniques. Shaving is therefore preferred where anatomy allows, and segmental resection is reserved for extensive involvement without a conservative alternative.

Urinary tract involvement

Short Answer:

Bladder involvement is usually treated with discoid excision and temporary catheterisation, while ureteral involvement ranges from simple ureterolysis to resection, depending on whether disease compresses or infiltrates the ureter wall.

Bladder

Bladder involvement is usually managed by a discoid excision of the bladder wall followed by a two-layer suture, with bladder catheterisation for 7 to 14 days depending on extent. The risk of vesico-vaginal fistula is low with careful technique.

Ureters

Ureteral involvement may be extrinsic (compression by peri-ureteral tissue) or intrinsic (infiltration of the wall). Procedures range from simple ureterolysis to resection-anastomosis or bladder reimplantation. Pre-operative ureteral stenting is common to secure the procedure.

Diaphragmatic and thoracic endometriosis

Short Answer:

Diaphragmatic or pleural endometriosis is rare, typically causing cyclic scapular pain or catamenial pneumothorax, and usually requires a joint gynaecological and thoracic surgery approach.

When it does occur, it typically shows up as cyclic scapular pain or catamenial pneumothorax — a collapsed lung that recurs in step with the menstrual cycle. A thoracic surgery team is usually brought in alongside the gynaecological one.

Choice of surgical energy

Short Answer:

Different energy sources — monopolar, bipolar, plasma, CO₂ laser, ultrasonic — trade off haemostasis against thermal tissue damage differently, and the choice depends on surgeon experience, the operative site, and available equipment.

Several energy sources are used in endometriosis surgery:

Ultimately, the choice comes down to the surgeon’s experience, the operative site, and what equipment is on hand.

Ovarian preservation techniques

Short Answer:

Ovarian-sparing alternatives to standard cystectomy — plasma energy ablation and stroma-reapproximation suturing — can meaningfully reduce AMH loss after endometrioma surgery, though neither has been shown to improve pregnancy rate over standard cystectomy.

Standard cystectomy removes the endometrioma capsule but also strips away adjacent healthy ovarian tissue, which is the main driver of the AMH drop seen after surgery. Several ovarian-sparing alternatives aim to treat the cyst while keeping more functional tissue intact.

Neither technique has been shown to outperform cystectomy on pregnancy rate, and availability depends on surgeon training and equipment. The choice matters most for young women, a single remaining ovary, bilateral disease, or an already reduced ovarian reserve — situations where every unit of AMH counts. Ask about the surgeon’s specific technique before an endometrioma operation if fertility preservation is a priority.

Surgical risks to keep in mind

Short Answer:

Endometriosis surgery carries risks including recurrence, ovarian insufficiency after cystectomy, fistula, ureteral injury, and post-operative adhesions — risks strongly modified by the expertise level of the operating centre.

Like any complex pelvic surgery, endometriosis surgery carries risks that should be clearly explained:

The expertise level of the centre is one of the main modifiers of these risks.

Recurrence and prevention

Short Answer:

Endometriosis recurs in roughly 21.5% of patients at 2 years and 40 to 50% at 5 years without maintenance treatment, but continuous hormonal therapy after surgery significantly reduces that risk.

Recurrence is estimated at about 21.5 % at 2 years and 40 to 50 % at 5 years without post-operative medical therapy. The rate depends on initial stage, completeness of excision, age and hormonal context.

Maintenance medical treatment significantly reduces recurrence risk:

This treatment is offered after surgery in women without immediate pregnancy plans. See treating endometriosis pain.

Surgery and fertility

Short Answer:

Whether surgery helps fertility depends heavily on context — it may modestly help in early-stage disease, but routine endometrioma removal before IVF is not recommended, and ovarian surgery should generally be avoided when reserve is already severely diminished.

The effect of surgery on fertility depends on context:

Dr Aksoy’s clinical perspective

“I usually tell the patient: seeing endometriosis on imaging doesn’t automatically mean you need surgery. The decision isn’t based on how dramatic the scan looks — it’s based on how severe your pain is, your age, your ovarian reserve, whether you want children, and which organs the disease actually affects.

“I weigh surgery against three questions: Will it meaningfully improve the patient’s pain or quality of life? Will it protect an organ — bowel, ureter — from developing damage? Will it genuinely improve the chance of pregnancy? If none of these gets a strong ‘yes,’ I don’t recommend surgery just because a focus of endometriosis was found.

“I explain the difference between excision and ablation this way: ablation burns the surface of the visible focus; excision tries to remove the diseased tissue along with its margins. Especially in deep endometriosis, excision can give a more thorough, more lasting treatment. But the more radical-looking surgery isn’t always the better surgery — success in surgery is as much about preserving healthy ovarian, bowel, ureteral, and nerve tissue as it is about removing as much tissue as possible.

“When there’s bowel involvement, the line I use is: not every bowel endometriosis requires removing a segment of bowel. In suitable patients, bowel-sparing methods like superficial shaving or disc excision can be enough. Segmental resection should be chosen based on how large and deep the lesion is, whether it’s causing narrowing, and how much of the bowel circumference is involved.

“With patients who want fertility, I specifically talk through ovarian reserve: endometrioma surgery can remove the cyst, but healthy ovarian tissue and part of the egg reserve can be lost along with it. The surgery can look technically successful while the patient’s chance of conceiving goes down. That’s why, especially with bilateral endometrioma, low AMH, advanced reproductive age, or prior ovarian surgery, we make the decision very carefully — in some patients we discuss egg or embryo freezing first.

“What bothers me most is when every endometrioma is operated on automatically, without AMH and antral follicle count being assessed beforehand. The second thing that bothers me is being told ‘we cleared everything, it won’t come back.’ Endometriosis is a chronic disease — it can recur even after well-performed surgery. Post-operative hormonal suppression, pregnancy plans, and a follow-up strategy need to be discussed from the start.

“When I summarise the surgical decision for a patient, I put it this way: our goal isn’t to clean up the MRI image — it’s to treat you. The best surgery isn’t the biggest surgery; it’s the one that reduces your symptoms while best protecting your organs, your ovarian reserve, and your future chance of pregnancy.”

In practice

Request a Case Review

If surgery is being discussed for your case, a review of your imaging, symptom pattern, and fertility plans helps clarify which technique and timing actually apply to you, rather than a generic protocol. You can request a confidential case review before deciding on surgery.

FAQ

Why prefer excision over ablation?

Randomised studies (Pundir 2017, Healey 2014) show excision is superior for dyschezia, dyspareunia, chronic pelvic pain and overall quality-of-life scores. Excision also allows complete histology and limits thermal injury to healthy tissue.

Will I lose part of my bowel during surgery?

Not systematically. Conservative techniques (shaving, discoid excision) are preferred where anatomy allows. Segmental resection is reserved for extensive, circumferential or multifocal involvement. The Bendifallah 2020 meta-analysis shows that shaving has markedly fewer complications.

How long is the recovery after surgery?

For standard laparoscopic surgery of superficial endometriosis, return to normal activities takes 2 to 4 weeks. For DIE surgery with bowel or urological resection, recovery may take 6 to 8 weeks depending on extent.

What is the risk of recurrence after surgery?

About 21.5 % at 2 years and 40 to 50 % at 5 years without post-operative medical therapy. Risk is significantly reduced by maintenance hormonal therapy (continuous combined contraceptive, dienogest or LNG-IUS) in women without immediate pregnancy plans.

Should surgery be performed to improve fertility?

It depends on stage and context. Excision of superficial lesions may modestly improve chances of spontaneous pregnancy. Routine cystectomy of an endometrioma before IVF is not recommended. The decision is individualised by EFI, age, ovarian reserve and associated factors.

How do I choose where to have surgery?

For deep endometriosis, prefer an expert centre with:

Is there an alternative to surgery?

Yes. Stepped medical treatment (combined contraceptives, dienogest, GnRH agonists with add-back) is effective for most pain and should be tried before considering purely diagnostic surgery. Surgery remains indicated for refractory pain, symptomatic deep endometriosis, or complications.

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Dr. Senai Aksoy

Dr. Senai Aksoy studied and trained in France before returning to Turkey, where he was a founding member of the ICSI team at Sevgi Hospital, Ankara — the country's first ICSI centre (1994-95) — and a co-author on the first Turkish ICSI publications produced in collaboration with the Brussels Van Steirteghem group (Human Reproduction, 1996; PMID 8671323). He helped build the IVF programme at the American Hospital Istanbul and has been running his own fertility practice since 1998.

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The content has been created by Dr. Senai Aksoy and medically approved.