
Gynecologic Oncologists - Safest Choice for Complex Endometriosis Surgery?
For deep or advanced endometriosis, oncology-trained surgeons often provide safer, more complete excision. Learn what this means for you at the Lotus Endometriosis Institute.
Discover how Lotus can guide you toward lasting relief.
Explore why patients choose Lotus
Search expert-written answers, browse by topic, or find information based on where you are in your journey.
Explore All KnowledgeReach out and start your healing journey.
Schedule an AppointmentGuides to recognizing, diagnosing, and treating deep infiltrating endometriosis, including bowel, bladder, and nerve involvement. Covers medical therapy, imaging, advanced surgery, multidisciplinary care, and future directions.
Deep infiltrating endometriosis (DIE) occurs when endometriosis grows more than 5 mm beneath the peritoneum, forming firm nodules and scar tissue that can tether organs. It most often affects the uterosacral ligaments, rectovaginal septum, bowel, bladder, and ureters, and may irritate nearby nerves. Symptoms frequently include severe period and pelvic pain, deep pain with sex or bowel movements, urinary urgency or bleeding with menses, and neuropathic pain patterns.
Care centers on precise mapping and coordinated treatment. Expert transvaginal or transrectal ultrasound and pelvic MRI can identify depth and organ involvement, guiding decisions on medicines, pelvic floor therapy, and when to consider advanced excision. Hormonal therapies can reduce inflammation and bleeding, but fibrosis and organ distortion may persist, so surgery by teams experienced in colorectal and urologic involvement is sometimes recommended. Fertility planning is individualized; some benefit from anatomy‑restoring excision while others proceed directly to IVF based on age and goals. For organ‑specific information see Bowel Endometriosis and Bladder Endometriosis, imaging guidance in Ultrasound and MRI, surgical planning in Imaging for Surgery and Excision Surgery, and nerve‑focused care in Nerve Pain.
Yes—an ovarian endometrioma (often called a “chocolate cyst”) can rupture, although it’s not the most common course. When it ruptures, the thick, inflammatory cyst contents can spill into the pelvic cavity and trigger sudden, severe pain and significant irritation. People may describe it as a sharp one-sided pelvic pain that comes on abruptly, sometimes with bloating, nausea, or a feeling that “something is very wrong.” Because other urgent problems can feel similar (like ovarian torsion, a ruptured non-endo cyst, or appendicitis), the situation needs prompt evaluation.
If you suspect a rupture or you develop a sudden escalation in pain—especially with fever, faintness, vomiting, shoulder pain, or worsening abdominal swelling—don’t try to “wait it out.” Our team can help you determine what’s happening, use the right imaging and exam to clarify the cause, and decide whether monitoring, targeted medical support, or surgery is the safest next step. If you’re living with an endometrioma and worry about rupture risk, recurrence, or fertility impact, we can also discuss longer-term options such as excision-based surgical management or less invasive approaches in carefully selected cases.
Yes—endometriosis can affect the kidneys indirectly when it involves the ureters (the tubes that drain urine from the kidneys to the bladder). Deep endometriosis can grow on or around a ureter and cause narrowing or blockage, which can lead to urine backing up into the kidney (hydronephrosis). Over time, that pressure can threaten kidney function.
What makes this especially tricky is that ureter involvement can be “silent”—some people have minimal urinary symptoms, or symptoms that don’t feel like a kidney issue at all, until imaging shows swelling of a kidney. When urinary symptoms do happen, they may look more like bladder irritation (burning, pressure, painful urination) that worsens cyclically rather than obvious signs like visible blood in the urine.
If you have known or suspected deep endometriosis, new urinary symptoms, recurrent “UTI” complaints with negative cultures, flank/back pain, or imaging that mentions hydronephrosis, our team takes that seriously and evaluates the full urinary tract—not just the pelvis. We can help map where disease may be affecting the bladder and ureters and discuss what treatment can look like, including minimally invasive excision when appropriate—reach out to schedule a consultation.
Not reliably. The ASRM stages (I–IV) mainly describe what’s seen at surgery—location, amount of disease, scarring, and adhesions—not how your nervous system experiences pain. That’s why someone can have “low-stage” endometriosis with debilitating symptoms, while another person with more extensive disease reports surprisingly little pain.
Pain tends to correlate more with where lesions are, whether deeper structures are involved (like bowel, bladder, ureters, or pelvic nerves), and how much inflammation, pelvic floor guarding, and pain sensitization have developed over time. In our practice, we focus less on the stage number and more on your specific symptom pattern (period pain, pain with sex, bowel/bladder symptoms, cyclical flares, leg or diaphragmatic pain), paired with expert imaging when appropriate, to understand what’s driving your pain.
If you’ve been told your pain “shouldn’t be that bad” because of a stage label, you’re not alone—and you’re not imagining it. Exploring endometriosis subtypes, coexisting conditions (like adenomyosis), and pain mechanisms often explains the mismatch and opens the door to more targeted treatment options, including excision when indicated. If you’d like, you can reach out to schedule a consultation so our team can review your history and help map symptoms to likely sources.
Diaphragmatic endometriosis is frequently missed before surgery because it sits outside the “typical” pelvic areas most exams and standard imaging focus on. Even high-quality ultrasound or MRI isn’t a simple yes/no detector—some lesions are small, superficial, or positioned in a way that makes them hard to visualize, and some people have little to no diaphragm-specific symptoms. When symptoms do happen, they’re often mistaken for non-gynecologic issues unless the timing is clearly cyclical (for example, right upper abdominal, chest, or shoulder-tip pain that flares around periods).
Surgery is often when it’s finally identified because minimally invasive laparoscopy/robotic surgery allows direct inspection of the diaphragm, which can reveal implants that scans and routine pelvic evaluation don’t “map.” This is also why surgical planning matters: diaphragm excision requires specific skill and careful decision-making, since the diaphragm is thin and disease can, in rarer cases, extend toward the chest. If your diaphragm endometriosis wasn’t recognized until surgery, it doesn’t mean it wasn’t real earlier—it usually reflects the limits of pre-op testing and how easily this location can be overlooked. If you’re still having cyclical chest/shoulder/rib pain or breathing-related flares, our team can help review your history, imaging, and operative findings and plan next steps with the right expertise in place.
Extra-pelvic endometriosis is uncommon overall. In the vast majority of people, endometriosis is confined to the pelvis (ovaries, pelvic peritoneum, bladder/ureters, rectum), and when it extends beyond that, it more often shows up higher in the abdomen—such as on the bowel or diaphragm—rather than far outside the abdomen.
Truly distant “extra-pelvic” disease (for example, inside the chest cavity or lungs—often grouped under thoracic endometriosis syndrome) is considered rare, even though it’s the most common of the rare extra-pelvic presentations. Because these cases can be overlooked, the pattern matters: symptoms that reliably flare with your cycle—like right-sided upper abdominal/shoulder/chest pain, shortness of breath, or recurrent lung collapse around menstruation—can be a clue that endometriosis may not be limited to the pelvis. If this sounds familiar, our team can help you think through your symptom pattern and plan the right evaluation and surgical strategy, including inspecting areas like the diaphragm when it’s appropriate.
If you’re in the ER with pelvic or abdominal pain and you have endometriosis (or strong suspicion of it), lead with the facts that help them triage safely: your diagnosis status (surgically confirmed vs suspected), any prior operative and pathology findings, and whether you’ve had complications like bowel, bladder, appendix, or diaphragm/thoracic involvement. Tell them what today’s pain is doing differently from your baseline—sudden onset, one-sided or right-lower-quadrant pain, fever, vomiting, fainting, heavy bleeding, chest/shoulder pain, or shortness of breath—and whether it seems cyclical or tied to your period. ER teams are trained to rule out emergencies first, so describing “what changed” and “what worries you most” helps them move faster and document the right differentials.
It also helps to be very specific about your symptom pattern and functional impact rather than just saying “endo flare.” For example: pain with urination or bladder filling, pain with bowel movements, constipation/diarrhea flares, rectal pressure, deep pain with sex, or pain that radiates to the back/leg—especially if those symptoms have a clear cycle pattern. If you have records, bring or show the most useful ones: operative reports, pathology reports, and recent imaging reports (and images if you have them). Those details can prevent your history from being minimized just because a CT or ultrasound looks “normal.”
After the urgent issue is addressed, many patients still need a clearer plan for the underlying driver of recurrent ER-level pain. Our team can review your records, make your history “clinically legible,” and discuss whether specialized evaluation and excision surgery may be appropriate—especially if you’ve been dismissed, have persistent symptoms despite prior treatment, or suspect deeper or multi-organ disease.
Yes—endometriosis can still be a real possibility even if your colonoscopy was normal. Colonoscopy mainly evaluates the inner lining of the bowel (the mucosa), but bowel endometriosis more often lives on the outside of the bowel or within deeper layers of the bowel wall. That means symptoms like pain with bowel movements, cramping, constipation/diarrhea (often alternating), bloating, or even cyclical rectal bleeding can happen while the colonoscopy looks completely “normal.”
In our evaluation process, we focus on the pattern and full constellation of symptoms—especially whether bowel flares track with your cycle or occur alongside pelvic pain, painful sex, urinary symptoms, infertility, or heavy bleeding that can point to coexisting adenomyosis. We often use expertly interpreted pelvic imaging (such as targeted ultrasound or MRI) to help map suspected deep disease and to look for other pelvic conditions that can mimic bowel symptoms or amplify them, like pelvic floor dysfunction, dysbiosis/SIBO patterns, hernias, or vascular compression issues.
If your story fits, our team can help you sort out whether this is bowel endometriosis, endometriosis near (but not inside) the bowel, or another overlapping driver—and what that means for next steps. Because bowel disease is anatomy-dependent and higher-stakes, we prioritize careful pre-op mapping and a plan designed for complete treatment when surgery is appropriate. If you’d like, you can reach out to schedule a consultation so we can review your prior workup and build a clear diagnostic path forward.
It’s common for bowel symptoms to flare around your period because hormonal shifts can change how the bowel moves and how sensitive the pelvic nerves feel—and if you have endometriosis, those same shifts can amplify inflammation and pain. Endometriosis can affect the bowel directly (often the rectum/rectosigmoid) or irritate the tissues around it, so symptoms can feel “GI” even when the issue isn’t primarily inside the bowel. Scarring and tethering can also pull on the bowel as the uterus contracts during menstruation, making cramping, constipation/diarrhea swings, bloating, or pain with bowel movements more noticeable.
A cyclical pattern—especially pain with bowel movements during bleeding, rectal pressure, or rectal bleeding that tracks with your cycle—raises our suspicion for bowel involvement or deep disease behind the uterus. It’s also why some people have a normal colonoscopy yet still have significant symptoms, since endometriosis often affects the outer bowel surface or deeper layers rather than the inner lining a scope evaluates. If your symptoms are period-linked or progressively worsening, our team can help map what’s going on and talk through next-step evaluation and treatment options, including minimally invasive excision when appropriate.

For deep or advanced endometriosis, oncology-trained surgeons often provide safer, more complete excision. Learn what this means for you at the Lotus Endometriosis Institute.

Sciatic nerve endometriosis explained: key symptoms, how it's diagnosed (exam, MRI), and effective treatments including medication, PT, and surgical excision.

Deep infiltrating endometriosis: symptoms, causes, diagnosis and treatment. Medical therapy, ICG-guided surgery, stenting, pathology, and future outlook.
Dr. Steven Vasilev delivers best-in-class endometriosis guidance and a personalized treatment plan—built on evidence and your unique biology.
Led by Steven Vasilev, MD—an internationally recognized endometriosis specialist & MIGS surgeon—Lotus Endometriosis Institute is virtual-forward, with many patients traveling nationally for care. Clinical evaluation and surgical treatment are provided in California.
2121 Santa Monica Blvd, Santa Monica, CA 90404
8:00 am - 5:00 pm
Monday - Friday
154 Traffic Way, Arroyo Grande, CA 93420