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surgery & — Dr Jérémie Zeitoun Paris
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Benign Gynaecological Surgery · Paris 8th & Neuilly

Ovaries & Tubes surgery & laparoscopy Dr Jérémie Zeitoun · Gynaecological Surgeon Paris 8th

Ovarian cysts, endometrioma, adnexal torsion, hydrosalpinx. Minimally invasive, fertility-preserving.

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Conditions Diagnosis When to consult Surgery Recovery FAQ
Conditions

Ovarian and tubal pathologies: when to see a surgeon?

Ovarian cysts, endometrioma, adnexal torsion, hydrosalpinx — none of these conditions necessarily requires surgery. The surgical decision depends on symptoms, how the condition evolves over time, and your fertility goals. Each situation is evaluated individually.

01
Ovarian cyst
The different types
There are two main categories. Functional cysts (90% of cases) are linked to the menstrual cycle — follicular cyst or corpus luteum cyst. They disappear spontaneously within a few weeks, without intervention.

Organic cysts do not regress on their own: serous cyst (thin wall, clear fluid); mucinous cyst (multilocular, thick fluid); dermoid cyst or teratoma (contains fat, teeth, hair — benign but should be removed); serous or mucinous cystadenoma (benign epithelial tumour, can become very large); borderline tumour (atypical cells, requires oncological management).

Surgery is indicated when the cyst persists, grows, is symptomatic or suspicious on imaging (O-RADS ≥ 3).
02
Ovarian endometriosis
Endometrioma
An endometrioma is an ovarian cyst filled with menstrual blood, linked to endometriosis. It can cause significant pelvic pain and weaken the ovary by reducing its egg reserve.

For a long time these were routinely operated on. Today we know that classic surgery (cystectomy) always removes some healthy ovarian tissue alongside the cyst — which can reduce chances of pregnancy, especially if the procedure is repeated.

This is why specialised centres now favour ovary-sparing techniques: plasma energy vaporisation, which destroys the inner lining of the cyst without touching surrounding tissue, and ultrasound-guided alcoholisation (ethanol sclerotherapy), especially useful when the cyst returns after a first operation or when the egg reserve is already diminished.
03
Adnexal torsion & Hydrosalpinx
Emergencies and tubal conditions
Adnexal torsion is a surgical emergency: the ovary and fallopian tube twist on themselves, cutting off blood supply. Every hour counts. Emergency laparoscopy allows the adnexa to be untwisted and circulation restored. The goal is always to preserve the ovary — even if it looks necrotic, it often recovers after detorsion.

Hydrosalpinx is a dilated, obstructed fallopian tube filled with fluid. It significantly reduces IVF success rates, as the fluid refluxes into the uterus and disrupts implantation. Salpingectomy (removal of the tube) significantly improves IVF pregnancy rates. Removal of one tube does not prevent natural pregnancy if the other tube is healthy.
Diagnosis & imaging

Ovarian mass work-up: ultrasound and O-RADS score

The discovery of a cyst or ovarian mass on ultrasound does not mean surgery is necessary. Diagnosis relies on structured imaging, today codified by the O-RADS classification.

Step 1 — First-line
Pelvic ultrasound
Endovaginal Doppler ultrasound is the first-line examination. It characterises the mass: liquid or solid content, septa, vegetations, vascularisation. Each mass is classified using the O-RADS US score (1 to 5), which reflects the risk of malignancy and guides management.
Step 2 — If needed
Pelvic MRI with contrast
When ultrasound is insufficient — complex cyst, large mass, uncertain result — a pelvic MRI with contrast is requested. It better characterises the nature of the mass and assesses malignancy risk. Its result is expressed as an O-RADS MRI score, recommended by the French National Cancer Institute (INCa), which directly guides the decision: monitoring, surgery, or oncological management.

O-RADS classification — what your score means

1Normal ovary
2Almost certainly benign — monitoring or no action
3Low risk — MRI recommended
4Intermediate risk — surgical opinion required
5High risk — specialist oncological management

An O-RADS score of 4 or 5 does not necessarily mean cancer — it indicates that specialist management is needed.

You have a pelvic ultrasound or MRI showing a cyst or ovarian mass? Come with your results — we review them together in the consultation.

When to consult

Ovarian cysts, torsion, hydrosalpinx: signs not to ignore

Certain symptoms should prompt a rapid consultation. A pelvic ultrasound can often clarify the situation within minutes. If your report mentions an O-RADS score of 3, 4 or 5, or a suspicious adnexal mass, a surgical opinion is recommended.

Sudden, intense pelvic pain — suspect adnexal torsion: go to gynaecological A&E immediately
Cyclical pelvic pain (before or during periods)
Persistent heaviness or discomfort in the lower abdomen
Known ovarian cyst that is growing or not disappearing
Unusually heavy or painful periods
Difficulty conceiving (infertility)
Pain during intercourse (deep dyspareunia)

Not to be confused

PCOS (polycystic ovary syndrome) — PCOS is often confused with ovarian cysts. It is a hormonal disorder that causes the appearance of many small follicles on the ovaries — these are not true cysts. It manifests as irregular cycles, acne, and can lead to difficulties conceiving. Its management is medical, not surgical in the vast majority of cases.

You want prompt management or an opinion on your pelvic ultrasound or MRI results? Book a consultation.

Surgery

Ovarian surgery: laparoscopy as standard

Almost all these procedures are performed by laparoscopy — 3 to 4 small incisions on the abdomen, without opening it. Fast recovery, short hospitalisation, discreet scars.

Ovarian cystectomy
Removing the cyst while preserving the ovary

What it is. Cystectomy involves removing the cyst by dissecting it from the healthy ovarian tissue. The ovary is preserved. This is the reference procedure for benign cysts in women of reproductive age.

In the case of an endometrioma. Classic surgery (cystectomy) is increasingly avoided because it always removes some healthy ovarian tissue, which can reduce chances of pregnancy — especially if the procedure is repeated or both ovaries are affected. In specialised centres, ovary-sparing techniques are preferred: plasma energy vaporisation, which destroys the inner wall of the cyst without touching the surrounding tissue, and ultrasound-guided alcoholisation (ethanol sclerotherapy), particularly useful when the cyst returns after a first operation or when the egg reserve is already fragile. Cystectomy retains its place for very large cysts or when there is doubt about the nature of the cyst.

When is the ovary removed? Adnexectomy (removal of the ovary and fallopian tube) is reserved for specific situations: suspicious cyst, non-conservable ovary, or post-menopausal woman. It is not the default decision.

Recovery. Return home the next day or the same day depending on the case. Return to light activity within 1 week, sport after 3 to 4 weeks.

Adnexal torsion detorsion
A surgical emergency operated within hours

An absolute emergency. In case of adnexal torsion, every hour counts. The faster the intervention, the higher the chances of preserving the ovary. Emergency laparoscopy allows the adnexa to be untwisted and blood supply restored.

Is the ovary always preserved? The goal is to preserve it, even if the ovary appears necrotic to the naked eye — it often recovers after detorsion. Adnexectomy is only performed if the ovary is definitively non-viable.

And afterwards? If a cyst was the cause of the torsion, it will be treated during the same operation or in a subsequent procedure depending on the situation.

Salpingectomy for hydrosalpinx
Improving IVF success rates

Why operate? A hydrosalpinx reduces the chances of success in IVF — the fluid from the tube refluxes into the uterus and impairs embryo implantation. Salpingectomy (removal of the tube) significantly improves IVF success rates.

The contralateral tube. Removal of one tube does not prevent natural pregnancy if the opposite tube is healthy. In the case of planned IVF, salpingectomy is discussed with your fertility team before stimulation. In bilateral hydrosalpinx, IVF becomes the route to conception.

Recovery. Short procedure, often as day surgery. Return to normal activity within 5 to 7 days.

Recovery

After ovarian laparoscopy: recovery and timelines

Laparoscopy allows rapid recovery. Timelines vary depending on the extent of the surgical procedure.

Hospitalisation
Day to 2 nights
Simple cystectomy: often day surgery or 1 night at Clinique Hartmann. More complex procedures (extensive endometriosis, torsion): 1 to 2 days.
Return to work
5–10 days
Office work: 5 to 7 days. Physical work: 10 to 14 days. These timelines vary depending on individual recovery.
Physical activity
3–4 weeks
Walking from the next day. Light sport after 3 weeks. Intense activities and swimming after 4 weeks.

A word on fertility

Any ovarian surgery can impact the ovarian reserve, especially in cases of endometrioma or repeated surgery. If you have a desire for pregnancy, this point is discussed before the operation at Clinique Hartmann (Neuilly-sur-Seine) or at the Paris 8th practice — and an ovarian reserve assessment (AMH) can be proposed in advance.

Frequently asked questions

Questions about ovarian cysts and surgery

From what size should an ovarian cyst be operated on?
There is no universal threshold, but in practice: a functional cyst is monitored for up to 3 months regardless of size. For an organic cyst, surgery is discussed from 5 to 6 cm, especially if it is growing, causing pain, or has suspicious characteristics on imaging. Beyond 10 cm, the risk of torsion almost always justifies intervention. Size is only one criterion — appearance, symptoms and age matter equally.
Can one become pregnant with an ovarian cyst?
Yes, in the vast majority of cases. A functional cyst does not prevent pregnancy and often disappears spontaneously. An endometrioma or organic cyst can reduce the ovarian reserve and hinder conception — but this is not systematic. If you have a desire for pregnancy with a known cyst, a consultation allows assessment of whether prior management is useful or whether IVF is directly indicated.
An ovarian cyst after the menopause — is it dangerous?
Not necessarily, but it always warrants serious evaluation. After the menopause, functional cysts no longer exist — all cysts are therefore organic. The risk of malignancy is higher than before the menopause (approximately 15% of post-menopausal cysts). An ultrasound with O-RADS score, an MRI if necessary, and CA-125 measurement help guide the decision. A prompt surgical opinion is recommended.
What is the difference between PCOS and an ovarian cyst?
These are two very different things. Polycystic ovary syndrome (PCOS) is a hormonal disorder that causes the appearance of many small follicles on the ovaries — these are not true cysts. It manifests as irregular cycles, acne, weight gain, and can lead to difficulties conceiving. An ovarian cyst is an isolated fluid-filled sac, usually benign, unrelated to PCOS. The two can coexist but require very different management.
What is endometrioma alcoholisation?
Alcoholisation is a non-surgical technique performed under ultrasound guidance. A needle punctures the cyst, drains it, then injects alcohol which destroys its inner wall — without touching the surrounding ovarian tissue. It is mainly proposed when the cyst has returned after a first operation, to avoid operating again on an already fragile ovary. It can also be useful before IVF if the cyst impedes egg collection.
My report mentions an O-RADS score — what does it mean?
O-RADS (Ovarian-Adnexal Reporting and Data System) is a standardised classification of ovarian masses on ultrasound and MRI, recommended by the INCa. It ranges from 1 (normal ovary) to 5 (high risk of malignancy). An O-RADS score of 2 is reassuring and requires only monitoring. A score of 3 or 4 indicates that an MRI and/or surgical opinion are necessary. A score of 5 directs towards specialist oncological management. This score does not make a diagnosis — it guides the course of action.
Do all ovarian cysts need to be operated on?
No. The vast majority of ovarian cysts are functional and disappear spontaneously within a few cycles. Surgery is indicated when the cyst persists, grows, is symptomatic, or has suspicious characteristics on ultrasound. The decision also depends on age and desire for fertility.
What is an ovarian endometrioma?
An endometrioma is an ovarian cyst related to endometriosis, filled with menstrual blood accumulated over menstrual cycles. It often causes pelvic pain, especially during periods, and can weaken the ovarian egg reserve. Its management depends on the pain, desire for pregnancy and ovarian condition — and does not necessarily require surgery.
Is adnexal torsion a surgical emergency?
Yes, absolutely. Adnexal torsion is a surgical emergency that requires intervention within hours to prevent ovarian necrosis. The main sign is sudden, intense pelvic pain, often accompanied by nausea. In case of suspicion, go to gynaecological A&E immediately.
What is a hydrosalpinx and why operate?
A hydrosalpinx is a dilated, obstructed fallopian tube filled with fluid. It reduces IVF success rates because the fluid refluxes into the uterus and disrupts implantation. Salpingectomy (removal of the tube) significantly improves pregnancy chances in IVF. Removal of one tube does not prevent natural pregnancy if the other tube is healthy.
Can ovarian surgery affect fertility?
Yes, potentially. Any ovarian surgery can reduce the ovarian reserve, especially in cases of recurrent endometrioma or repeated surgery. This is why the surgical technique and fertility goals are discussed before the operation. An ovarian reserve assessment (AMH) can be proposed in advance.
How long is the hospital stay?
For a simple cystectomy or salpingectomy, hospitalisation is short — often day surgery or 1 night at Clinique Hartmann, Neuilly-sur-Seine. For more complex procedures (extensive endometriosis, torsion): 1 to 2 days. Return to light activity within 5 to 7 days.
Is the ovary always removed when operating?
No. The goal is to preserve the ovary whenever possible. Adnexectomy (removal of the ovary and fallopian tube) is reserved for specific situations: suspicious cyst, non-conservable ovary, or post-menopausal woman. It is not the default decision.
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