Do I Really Need Excision Surgery? Endometriosis & Adenomyosis Insights

Living with a presumptive clinical diagnosis of endometriosis or adenomyosis can make it feel like surgery is inevitable—especially if pain is persistent, imaging is confusing, or you’ve already tried multiple medications. But “need surgery” isn’t a yes/no question so much as a decision that depends on your symptoms, your goals (including fertility), what’s been tried, and how confident your presumed clinical diagnosis is.

From a pure accuracy point of view, there is no diagnostic tool that is a blood test or imaging-based that can definitively tell you if endometriosis or adenomyosis is present or not. All available non-invasive tools fall far short of minimally invasive surgery for an accurate diagnosis. In the case of adenomyosis, the problem is even more daunting in most cases. With few exceptions (e.g. hysteroscopic biopsy evidence) adenomyosis can only be definitively diagnosed by a pathologist who is examining the uterus after a hysterectomy. But for endometriosis the diagnostic gold standard remains surgery, which is optimally combined with today's cornerstone of treatment, that being surgical excision.

However, recent research paints a more nuanced picture. Some studies focus on improving how we detect deep endometriosis on ultrasound (so surgery is better targeted). Others highlight that bowel endometriosis surgery has several approaches—each with different tradeoffs. There’s also evidence that conditions that mimic endometriosis pain (like pelvic venous insufficiency, sometimes called pelvic congestion syndrome) are under-recognized, meaning surgery might not address the whole problem for some people. And while hormonal options continue to expand, they don’t work the same way for everyone. Some hormonal options are fraught with side effects which can be very unpleasant and lead to long term morbidity. Future molecularly targeted therapies may change the rubric even more.

This article pulls together findings from multiple recent papers to help you think through one core question: Do I really need surgery for endometriosis or adenomyosis right now?

When surgery is worth considering (and when it might not be)

Surgery tends to be most helpful when:

You have a strong reason to remove diseased and fibrotic tissue—particularly when disease is deep, distorting anatomy, or affecting organs like the bowel, bladder, or ureters. In those situations, medication may reduce symptoms but usually can’t fix the mechanical problems (like a narrowed bowel segment, tethered organs, hydronephrosis or obstructed Fallopian tubes).

Research on intestinal (bowel) endometriosis shows why symptom pattern and lesion burden can matter. In a surgical cohort, most people had pain and/or gastrointestinal symptoms before surgery, but a meaningful minority had mild or minimal symptoms despite confirmed intestinal lesions. Larger rectal nodules (over ~3 cm, using the #Enzian “C3” category) were linked with worse pain with bowel movements (dyschezia), more abdominal pain, and more rectal bleeding than smaller rectal lesions. That doesn’t mean symptoms perfectly “predict” disease, but it supports a practical point: when symptoms are severe—especially with bowel-movement pain—deep rectal disease becomes more likely, and surgery may be very relevant.

Surgery may also be considered when there are red-flag complications or risks, such as:

• suspected bowel narrowing/obstruction, ureteral involvement, or hydronephrosis
• rapidly worsening symptoms or organ function
• an adnexal mass concerning for something other than endometriosis
• infertility where anatomy (adhesions, endometrioma, hydrosalpinx) may be playing a role

Surgery may be less urgent when:

Symptoms are manageable, diagnosis is less certain, or you haven’t yet had a solid trial of non-surgical management—especially if the suspected disease is not threatening organ function. In those cases, many people prefer to start with medical therapy, pelvic floor and pain-focused care, or improved diagnostic workup before committing to an operation. The immediately visible problem here is that you really don't know what you are treating with any degree of certainty and may delay helpful definitive excision of endo and fibrosis.

As an example of symptom control, a randomized trial comparing two combined hormonal pill regimens (estetrol/drospirenone vs ethinyl estradiol/drospirenone) found that both reduced “worst” endometriosis-associated pelvic pain over 12 weeks, with a signal that the estetrol-containing pill may help nonmenstrual (day-to-day) pain more for some patients under a strict “responder” definition. Side effects—especially unscheduled bleeding early on—were common with both. The takeaway isn’t that one pill is “the answer,” but that trying (or revisiting) medical therapy can be a reasonable step before surgery, particularly when your priority is symptom control rather than removing disease for organ protection.

For adenomyosis in particular, hormonal strategies are often central because adenomyosis is within the uterine muscle—so even excellent excision surgery for endometriosis may not fully resolve symptoms if adenomyosis is a major driver. (This trial included some participants with adenomyosis, but didn’t report adenomyosis-specific outcomes—an example of where evidence still isn’t as tailored as patients need.)

The most common reasons doctors recommend surgery—and what they should explain

1) “We suspect deep endometriosis”

Deep endometriosis is not just “a lot of endometriosis”—it’s disease that can infiltrate structures like the uterosacral ligaments (USLs), bowel, or bladder, and it often needs specialized assessment and higher level surgical expertise because the ureters and rectum can be very close.

One barrier has been inconsistent imaging outside specialty centers. However, a 2025 reliability study looked at how consistently clinicians in non-specialized imaging/radiology settings could interpret ultrasound images of the uterosacral ligaments using defined features. They found substantial agreement overall for identifying key characteristics (like echogenicity and the presence of nodules). In plain terms: when a transvaginal ultrasound is performed and interpreted using an endometriosis-focused approach, different readers often agree on whether the USLs look abnormal.

At the same time, that study also showed that exact thickness measurement and measurement location were less consistent between observers—meaning a report that relies on “thickened ligament” alone may be less dependable than one describing multiple features (texture, nodules, overall appearance). This matters for surgery decisions because the better the pre-op mapping, the more likely surgery is targeted to your actual disease pattern and the best level excision surgeon is chosen.

What to ask if “deep endometriosis” is mentioned:

• Was the ultrasound/MRI done with an endometriosis mapping protocol (e.g., looking specifically at USLs, bowel, sliding sign, etc.)?
• Does the report describe multiple features (nodules, echotexture) rather than only thickness?
• If imaging is “normal,” does your clinician think that rules out deep disease—or just means it might be harder to see?

2) “You have bowel endometriosis”

If bowel involvement is suspected, “surgery” is not one single procedure. A recent multi-center review describes the three main excision approaches used in bowel endometriosis: shaving, discoid excision, and segmental resection. Across available data, more conservative options (shaving/discoid) are often favored when feasible because they may reduce surgical morbidity—while acknowledging that leaving disease behind (especially with shaving) can raise concerns about symptom persistence or recurrence.

A key patient-facing point from this review is what outcomes should be part of the conversation. It’s not only about pain scores. Bowel surgery can affect and be complicated by:

• bowel function (including urgency, clustering, or incontinence-type symptoms)
• fistula (abnormal opening between organs, like bowel to vagina or bladder)
• bladder emptying and urinary retention if autonomic nerves nearby are involved in the resection
• sexual function
• fertility (which remains difficult to compare cleanly across techniques because studies often differ in definitions, disease severity, and reporting)

In other words, if surgery is being recommended for bowel disease, you deserve counseling that goes beyond “we’ll remove it.” A complete risk-benefit discussion is prudent to understand what you are up against in the best and worse case scenarios. It is also prudent to speak to the surgeon who would be making the decision and actually performing the rectal surgery. Too many "experts" masquerade as being able to do this part of the surgery when, in fact, a behind-the-scenes general surgery "team" member may actually be doing that part. Team surgery is fine but you deserve to know this and, ideally, speak to those members of the surgical team that are likely to be performing critical parts of the surgery.

3) “Your fertility goals might be affected”

Endometriosis can affect fertility through inflammation, adhesions, tubal damage, endometriomas, and other mechanisms. But a less-discussed issue is that some disease may not be obvious even at surgery.

A pathology-focused study found Fallopian tube endometriosis was common on histology, especially among those with confirmed pelvic endometriosis—and most tubal lesions were microscopic (not visible to the surgeon). Tubal involvement was strongly associated with advanced disease and with findings like endometriomas, hydrosalpinx, and tubal adhesions.

This doesn’t automatically mean surgery improves fertility—or that tubes should be removed. What it supports is a more realistic expectation-setting conversation: even “good-looking” tubes can harbor disease, and visual inspection can miss it. If fertility is a major goal, decisions often involve more than “operate vs don’t operate”—they may include whether to prioritize IVF, whether to address hydrosalpinx (ie. remove the tube or not), whether or not to perform chromopertubation for tubal patency, how to handle endometriomas, and how to reduce surgical harm to ovarian reserve.

A crucial “pause”: could something else be driving your pain too?

One reason some patients feel disappointed after endometriosis surgery is not that surgery was “wrong,” but that chronic pelvic pain is often multifactorial. A gynecology-focused review on pelvic congestion syndrome (PCS)—pelvic venous insufficiency—argues it may account for a substantial portion of chronic pelvic pain and is underdiagnosed. PCS symptoms can overlap heavily with endometriosis (dysmenorrhea, dyspareunia, chronic pain), and the conditions can co-occur. PCS is generally not a surgically correctable process.

The review highlights a few clues that can tilt suspicion toward PCS:

• dull/heavy/dragging pelvic ache
• worse after prolonged standing or sitting
• post-coital pain (emphasized as particularly suggestive)

Studies also note that laparoscopy can miss PCS, while Doppler-capable transvaginal ultrasound can be used as a practical first-line tool when clinicians know what to look for (vein diameters, slow flow, reflux, dilated myometrial veins). This matters because if PCS is a significant contributor, excision surgery alone may not fully relieve pain—while vascular treatments (like embolization) may help selected patients.

If you’re unsure about surgery, asking “Have we considered vascular causes like PCS?” is not derailing the plan—it’s making sure the plan fits your whole symptom picture.

If you do choose surgery, what should you expect to trade off?

Surgery can be very effective for carefully selected patients, but the “cost” isn’t just the recovery period. It can include:

• risk of complications (which rises with bowel/urinary tract involvement and complexity)
• risk of persistent pain if other pain generators exist (pelvic floor dysfunction, central sensitization, PCS, adenomyosis if hysterectomy is not planned)
• possible effects on fertility depending on what is removed and how (especially ovaries/endometriomas)
• the reality that recurrence and symptom return can occur over time

There is also emerging imaging evidence that some surgeries change anatomy in ways we’re still trying to interpret. A retrospective MRI study reported that the posterior uterine isthmus (the back part of the lower uterus) appeared thinner after retrocervical/uterosacral ligament deep endometriosis resection on average. This study did not show uterine rupture (pregnancy data were small and no ruptures occurred), but it raises an important “we don’t fully know yet” issue: for people planning pregnancy after complex retrocervical surgery, individualized counseling and follow-up matter, and blanket rules are hard to justify from current data.

Practical takeaways: how to decide if you need surgery

Use your next appointment to move from “Should I have surgery?” to “What problem is surgery meant to solve in my case?”

• What is the specific surgical goal for me? Pain relief, organ protection, fertility optimization, diagnosis, or removing a mass?
• How confident are we about where the disease is? Was imaging endometriosis-focused (including uterosacral ligaments, bowel assessment, and—if relevant—Doppler for PCS)?
• What have we ruled in or out besides suspected endometriosis/adenomyosis? Especially PCS/vascular pain, pelvic floor dysfunction, bladder pain syndrome, IBS-like conditions.
• If bowel endometriosis is suspected, what technique is planned and why? Shaving vs discoid vs segmental resection should be a deliberate choice, not a surprise.
• Which outcomes will you track after surgery? Not only pain—also bowel, bladder, sexual function, and fertility-related outcomes that matter to you.

What we still don’t know

Even with better imaging and evolving surgical techniques, there are real evidence gaps that affect patient counseling:

• Not enough standardized outcome reporting in bowel surgery studies. Reviews repeatedly note heterogeneity—different definitions of “recurrence,” inconsistent measurement of bowel/bladder/sexual function, and limited long-term comparable data. This is one reason two surgeons can cite “the literature” and still recommend different approaches.
• Symptoms don’t perfectly predict disease location or severity. Some people with intestinal lesions have mild symptoms, and bloating can be driven by multiple mechanisms. This makes personalized evaluation critical.
• Some disease is microscopic and easy to miss. Fallopian tube endometriosis may be present without being visible, which complicates how we interpret “complete excision” and why pathology methods matter.
• Post-surgical anatomical changes and pregnancy implications need better data. MRI changes after retrocervical/USL excision have been described, but we don’t yet have large, prospective studies tying those imaging findings to obstetric outcomes.

The most patient-empowering conclusion from the combined evidence is this: you don’t need to decide based on fear or urgency alone. If organ function is not at risk, it is reasonable to slow down, take a deep breath, ensure imaging and differential diagnosis are thorough (including possible PCS), clarify what surgery is intended to achieve, and confirm that non-surgical options have been considered, thoughtfully tried—or thoughtfully declined for reasons that make sense in your life.