Excision surgery is a surgical approach where endometriosis tissue is cut out and removed, rather than only treating the surface. It is often discussed in specialist endometriosis care, especially when disease is deep, complex, affecting organs, or has not responded well to other treatment. Excision may help some people, but no surgery can guarantee symptom relief for everyone. The outcome depends on many factors, including disease location, surgical skill, other pain contributors, previous surgery, pelvic floor function, nerve sensitivity, adenomyosis, adhesions, fertility goals and follow-up care.
What excision means
Excision means the surgeon cuts out visible endometriosis lesions. This is different from ablation, which destroys or burns tissue on the surface. Ablation may be used in some situations, but it may not remove deeper disease. Excision may allow tissue to be sent for histology, where it is examined under a microscope. NICE says biopsy can be considered during laparoscopy to confirm endometriosis, while recognising that a negative histology result does not fully exclude endometriosis.
What excision may aim to do
Excision surgery may aim to:
- remove visible endometriosis lesions
- treat deep endometriosis
- treat adhesions or scar tissue
- treat endometriomas in selected cases
- reduce pain for some people
- improve function and quality of life
- support fertility planning for some people
- assess where disease is located
- collect tissue for histology
- document disease for future care
The aim of surgery should be explained clearly before you consent.
Why disease location matters
The complexity of excision depends on where endometriosis is found. Disease may involve:
- pelvic lining
- ovaries
- uterosacral ligaments
- bowel
- bladder
- ureters
- pelvic sidewall
- diaphragm
- thoracic area
- abdominal wall or scars
- nerves or nearby tissues
Deep or organ-involving disease may need advanced planning and a multidisciplinary team. Governing bodies such as NICE in the UK recommends referral to a specialist endometriosis service for suspected or confirmed endometrioma, deep endometriosis involving the bowel, bladder or ureter, or endometriosis outside the pelvic cavity.
Why surgeon experience matters
Endometriosis can look different from person to person. It may be obvious, subtle, deep, hidden by adhesions, or located close to important structures. An experienced surgeon may be better able to recognise different appearances of disease, assess whether complex areas are involved, and plan surgery safely. For complex disease, the team may need access to:
- an endometriosis surgeon
- colorectal surgeon
- urologist
- thoracic surgeon
- radiologist with endometriosis imaging expertise
- pain management support
- fertility services
- pelvic physiotherapy
Excision, ablation or both
Some operations may involve excision, ablation, or a combination. Before surgery, ask exactly what approach is planned and why. You may want to ask:
- Will lesions be excised, ablated or both?
- Why is this approach recommended for me?
- What areas will be checked?
- What happens if deep disease is found?
- What happens if disease is found on the bowel, bladder, ureter, diaphragm or nerves?
- Will another surgeon be available if needed?
The answer matters because the approach may affect treatment, risks, recovery and whether further surgery may be needed.
What excision cannot promise
Excision may help some people significantly, but it is not a guaranteed cure. Pain may continue or return because of:
- pelvic floor muscle tension
- nerve sensitivity or neuropathic pain
- adenomyosis
- adhesions
- bladder or bowel pain conditions
- incomplete treatment of disease
- disease in areas not treated during surgery
- central sensitisation or long-term pain patterns
- other conditions not caused by endometriosis
This does not mean the pain is not real. It means follow-up care matters.
Recovery and follow-up care
Recovery depends on the type and extent of surgery. Follow-up care may include:
- post-surgery review
- pain management
- pelvic physiotherapy
- bowel or bladder support
- fertility care
- hormonal treatment in some cases
- scar and mobility support
- emotional support
- monitoring if symptoms continue or return
Questions to ask before excision surgery
You may want to ask:
- What is the aim of surgery: diagnosis, treatment, or both?
- What areas will you check?
- Will lesions be excised, ablated or both?
- Will tissue be sent for histology?
- Do you treat deep or complex endometriosis?
- Do you treat bowel, bladder, ureter, diaphragm or nerve-related disease?
- Would another surgeon be available if needed?
- What happens if disease is more complex than expected?
- What are the risks in my case?
- Could surgery affect fertility or ovarian reserve?
- What recovery should I expect?
- What follow-up care will I have?
Prepare before you speak with a healthcare professional
Use our Prepare for Appointment Tool to organise your symptoms, previous treatments, scan results, surgery history, fertility priorities, questions and concerns before your appointment. You do not need a perfect diary. A clear summary of what is happening and how it affects your life can help the conversation feel more focused.
Finding the right type of care
Use the Endometriosis Care Directory to explore different types of endometriosis-related care providers. The directory is for research and information only. It is not a recommendation, referral service, ranking or medical advice. Always check details directly with the provider and speak with an appropriate healthcare professional before making decisions about your care.
Final reminder
Excision surgery means cutting out and removing endometriosis tissue. It can be an important option, especially for deep or complex disease, but it should be discussed carefully. You deserve clear information about the planned approach, the surgeon’s experience, possible risks, alternatives, histology, recovery and follow-up care. This resource is here to support your understanding, not replace medical advice from a qualified healthcare professional.