Diaphragm Endometriosis Surgery
Endometriosis on the diaphragm, the breathing muscle under the lungs, can cause shoulder or chest pain with your period. It's often found only during surgery, so the time to plan for it is before.
- Typical sign
- Right shoulder or chest pain with your period
- How
- Robotic or laparoscopic, in the same operation
- Hospital stay
- Depends on what else is treated
Medically reviewed by Dr. Steven Vasilev, MD
Quadruple board-certified in surgical and integrative therapies, Minimally-Invasive Robotic Endometriosis-Excision Surgeon, Director of Lotus Endometriosis Institute · Updated Oct 2026
- The diaphragmEndometriosis on its surface, most often on the right side, over the liver.
- Rarely, the chestDisease on the lung lining can collapse a lung around a period; a thoracic surgeon joins the plan.
- The liverRight under the diaphragm, which is why the disease is hard to see and reach.
- The right shoulderThe diaphragm shares nerves with it, so the pain is felt here.
Endometriosis
Why it hurts in the shoulder
The diaphragm shares nerves with the shoulder, so pain from the diaphragm can be felt in the shoulder. What points to endometriosis is the timing: it flares in the days before or during your period, and often hurts more with a deep breath.
Is it right for me?
When shoulder, chest or rib pain flares with your period, endometriosis was seen on the diaphragm before, or a lung has collapsed around a period.
Usually worth considering if
- Shoulder pain with your periodUsually the right shoulder, sometimes the neck or arm.
- Chest or rib pain with your periodOften sharper with a deep breath or a cough.
- It was seen at an earlier surgeryBut not removed, because the surgeon wasn't prepared to.
- A collapsed lung around a periodRare, but it means the chest needs checking too.
- Deep or widespread pelvic diseaseDiaphragm disease is more common when pelvic disease is advanced.
- Medication isn't enoughHormones can calm flares; they don't remove the disease.
Often improves
- Shoulder, chest and rib pain that follows your cycle
- Pain with a deep breath around your period
- A definite diagnosis, confirmed by pathology
Won’t fix on its own
- Shoulder or chest pain from other causes, such as the spine, the lungs or the heart
- A lifetime cure: endometriosis is a chronic disease
That's why other causes are ruled out first, and why care can continue after surgery with hormonal therapy when it fits.
Imaging often misses the diaphragm, so a normal scan doesn't rule it out. What finds it is a surgeon who looks, and is ready to treat what's there.
How does it compare?
Planned for, it's removed in the same operation. Found by surprise, it's often only photographed, and another surgery follows.
| Compared | Planned excision | Found during another surgery | Hormone medication |
|---|---|---|---|
| What happens | Removed in the same operation as the pelvic disease | Often only photographed or biopsied; a second operation follows | Flares calm; the disease stays |
| If it goes through to the chest | A thoracic surgeon is part of the plan from the start | The operation may have to stop | Can't be seen or treated |
| Afterwards | For many, the most lasting relief; normal routines in 2–3 weeks | Symptoms continue until the next surgery | Symptoms often return when the medication stops |
Planned excision
- What happens
- Removed in the same operation as the pelvic disease
- If it goes through to the chest
- A thoracic surgeon is part of the plan from the start
- Afterwards
- For many, the most lasting relief; normal routines in 2–3 weeks
Found during another surgery
- What happens
- Often only photographed or biopsied; a second operation follows
- If it goes through to the chest
- The operation may have to stop
- Afterwards
- Symptoms continue until the next surgery
Hormone medication
- What happens
- Flares calm; the disease stays
- If it goes through to the chest
- Can't be seen or treated
- Afterwards
- Symptoms often return when the medication stops
What happens, step by step?
A video consultation, imaging when it helps, a plan that includes the diaphragm, then one operation.
Before surgery
Planning consultation
By video. The timing of your pain matters most: when it starts, which side, and whether it flares with your period or a deep breath.
Testing
MRI, sometimes CT, can raise suspicion and rule out other causes, but often misses small spots. If a lung has collapsed or the chest may be involved, a thoracic surgeon reviews your case.
Your plan
The diaphragm is included in the plan and in your consent, so it can be treated when it's found. Insurance and a fixed price are settled before anything is booked.
Surgery day
The operation
Robotic or laparoscopic, through the same small incisions as the pelvic surgery. Both sides of the diaphragm are inspected, and the disease removed.
Often in the same operation: endometriosis excision · bowel surgery
More about The operation
The diaphragm is thin, so the chest is sometimes entered during excision; in expert hands that's repaired at once. If the disease is known to go through to the chest, the operation is planned with a thoracic surgeon, sometimes with a camera in the chest (VATS) as well.
In the hospital
Most often it is still a same-day outpatient procedure. When it isn't, how long you stay depends on everything treated in the same operation. Shoulder and upper abdominal soreness are common for a few days.
Recovery
- Week 1
Early recovery
Gentle walking and deep breathing from the start. Many people walk comfortably within about a week.
- Weeks 2–4
Back to normal
Normal routines in 2–3 weeks for many people, and full activity around a month. Heavy lifting and hard core work wait until your team clears you.
Follow-up
- 3 months
Follow-up
Your pathology results and a video check-in about your shoulder and chest pain, and whether anything more is needed to keep it away.
Who should do it?
A surgeon trained to operate in the upper abdomen, with a thoracic surgeon in the plan if disease beyond the diaphragm, or in the lungs, may be involved.
Diaphragm disease is easy to miss and hard to reach. Many surgeons who find it during pelvic surgery photograph it and stop, because they aren't trained to operate in the upper abdomen. Dr. Vasilev is a gynecologic oncologist, and operating on the diaphragm is part of that training, so it's treated in the same operation instead of a second one.
“If there's a strong suspicion or evidence of diaphragm or chest disease, the time to plan for it is before surgery, not when you find it.”
Patients often ask
Is my shoulder or chest pain from diaphragmatic endometriosis?
Diaphragmatic endometriosis can cause shoulder or chest pain that tends to be cyclical and frequently right-sided, flaring before or during your period. Many non-gynecologic causes can also explain this pain, especially if it’s left-sided or not tied to your cycle.
How is diaphragmatic endometriosis diagnosed?
The most reliable way to diagnose diaphragmatic endometriosis is minimally invasive surgery to inspect the diaphragm and remove suspicious lesions for pathology when appropriate. Imaging can help guide evaluation, but a normal scan does not rule it out.
Can medication manage diaphragmatic endometriosis, or is surgery needed?
Medication can help many patients manage diaphragmatic endometriosis symptoms, but it does not remove the disease. Surgery becomes more likely when pain continues despite medication, deeper nodules are suspected, or symptoms raise concern for chest involvement.
Can thoracic endometriosis cause a collapsed lung?
Yes, in rare cases, thoracic endometriosis can be associated with a spontaneous collapsed lung that tends to recur around menstruation, called catamenial pneumothorax. Symptoms may include one-sided chest pain, shortness of breath or shoulder discomfort.
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Next: Who should operate?What to look for in any surgeon, and Dr. Vasilev’s results.