Assessment of Ovarian Reserve in the Treatment of Ovarian Endometrioma With Cystectomy or Argon Plasma Coagulation: A Aandomized Clinical Trial

NCT07666412 | Not Yet Recruiting

• 1 other identifier: ARG-OMA
• Study Type: interventional
• Target: 146
• Locations: 1 country
• Sites: 1

Brief Summary

Endometriosis is a benign, chronic, and often recurrent gynecological disease affecting approximately 10% of women of reproductive age. Among the different manifestations of the disease, ovarian endometrioma represents one of the most common forms, occurring in up to 50% of affected patients. Endometriomas may cause progressive damage to ovarian tissue through both mechanical effects and direct toxic effects related to the inflammatory and oxidative content of the cyst, ultimately leading to a reduction in ovarian reserve. When medical treatment is insufficient or not indicated, surgery represents a therapeutic option. The aim of surgery is to remove the cyst while minimizing the risk of recurrence and preserving as much healthy ovarian tissue as possible. Currently, the most widely used surgical technique is laparoscopic cystectomy performed by stripping the cyst capsule. However, this procedure may result in the inadvertent removal of healthy ovarian tissue and a consequent reduction in ovarian reserve. In recent years, ablative surgical techniques have been developed with the aim of reducing damage to the ovarian parenchyma. Among these, Argon Plasma Coagulation (APC) is a technique that uses a high-energy argon plasma jet to vaporize and coagulate superficial tissues. From a histological perspective, APC induces limited-depth tissue necrosis, generally confined to the cyst capsule, potentially reducing the risk of damage to the underlying ovarian tissue. In addition, this technology may offer practical and economic advantages. Several studies suggest that ablative techniques may have a lower impact on ovarian reserve compared with cystectomy, as assessed by antral follicle count and serum anti-Müllerian hormone (AMH) levels, a reliable biomarker of ovarian reserve. However, the available evidence mainly derives from observational studies or studies using ablative technologies different from the one investigated in the present study. Furthermore, the systematic use of ablative techniques remains controversial in clinical practice, partly because of the potential risk of recurrence associated with residual endometriotic tissue. To date, no randomized clinical trials have directly compared the impact of APC versus cystectomy on ovarian reserve in patients with ovarian endometrioma. Moreover, data are lacking regarding recurrence risk, post-treatment ovarian ultrasound characteristics following APC ablation, and the histological effects of this technique on endometriotic cysts. In light of these considerations, the present randomized clinical trial aims to compare the effect of cystectomy and Argon Plasma Coagulation ablation on the preservation of ovarian reserve in patients undergoing surgical treatment for ovarian endometrioma, while also evaluating ultrasound outcomes and recurrence risk during follow-up.

Conditions

Ovarian Endometrioma

Outcome Measures

Primary Outcomes (1)

• Late effects of APC or cystectomy on the AFC of the treated ovary

  Change in antral follicle count (ΔAFC) of the treated ovary between baseline (T0) and 12 months (T2).

  12 months after surgery (T2).

Secondary Outcomes (8)

• Early effects of APC or cystectomy on the AFC of the treated ovary

  40-60 days after surgery (T1).

• Late effects of APC or cystectomy on serum AMH levels

  12 months after surgery (T2).

• Early effects of APC or cystectomy on serum AMH levels

  40-60 days after surgery (T1).

• Temporal pattern of AFC variation

  Baseline (T0), 40-60 days after surgery (T1), 12 months after surgery (T2)

• Temporal pattern of AMH variation

  Baseline (T0), 40-60 days after surgery (T1), 12 months after surgery (T2)

Study Arms (2)

Argon Plasma Coagulation (APC) ablation

EXPERIMENTAL

Cyst opening and drainage, ablation of the inner surface of the cyst capsule using APC, and multiple biopsies of the cyst capsule.

Procedure: Argon Plasma Coagulation (APC) ablation

Cystectomy

NO INTERVENTION

Removal of the cyst capsule using the stripping technique, followed by ultra-selective hemostasis with bipolar energy and suturing of the ovarian parenchyma for hemostatic and reconstructive purposes (when indicated).

Interventions

Argon Plasma Coagulation (APC) ablation PROCEDURE

Cyst opening and drainage, ablation of the inner surface of the cyst capsule using APC, and multiple biopsies of the cyst capsule.

Argon Plasma Coagulation (APC) ablation

Eligibility Criteria

• Age: 18 Years - 40 Years
• Sex: female
• Healthy Volunteers: No
• Age Groups: Adult (18-64)

You may qualify if:

• Symptomatic patients (pain and/or infertility) affected by ovarian endometriomas (unilateral or bilateral).
• Age between 18 and 40 years.
• Ultrasound diagnosis of one or more mono- or bilateral endometriotic cysts, with a maximum overall diameter (per ovary) ≤ 80 mm and at least one cyst diameter ≥ 20 mm.
• Use of hormonal therapy for at least 1 month prior to surgery.
• Willingness to undergo follow-up at 40-60 days and 12 months, according to clinical practice.
• Willingness to receive postoperative hormonal therapy, according to clinical practice, to minimize the risk of recurrence.
• Written informed consent obtained.

You may not qualify if:

• History of unilateral ovariectomy/adnexectomy or hysterectomy.
• Ultrasound evidence of other non-endometriotic ovarian cysts requiring surgical removal.
• Atypical endometrioma or ultrasound suspicion of malignancy.
• Previous surgery on one or both ovaries within 12 months prior to surgery.
• Known or suspected active oncological disease.
• Inability to undergo transvaginal ultrasound examination (patients with intact hymen).

Sponsors & Collaborators

• IRCCS Azienda Ospedaliero-Universitaria di Bologna: lead

Study Sites (1)

IRCCS Azienda Ospedaliero-Universitaria di Bologna

Bologna, Bologna, 40138, Italy

Location

MeSH Terms

Conditions

Endometriosis

Interventions

Argon Plasma Coagulation

Condition Hierarchy (Ancestors)

Genital Diseases, Female; Female Urogenital Diseases; Female Urogenital Diseases and Pregnancy Complications; Urogenital Diseases; Genital Diseases

Intervention Hierarchy (Ancestors)

Electrocoagulation; Cautery; Therapeutics; Hemostatic Techniques; Ablation Techniques; Surgical Procedures, Operative; Hemostasis, Surgical

Central Study Contacts

Diego Raimondo, MD

CONTACT

+393290636618; die.raimondo@gmail.com

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: SINGLE
• Who Masked: OUTCOMES ASSESSOR
• Purpose: TREATMENT
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Model Details: Ovarian reserve assessment will be performed through pre- and post-operative ultrasound evaluation of the antral follicle count (AFC), carried out by an experienced blinded sonographer. To ensure blinding, the experienced sonographer will be assisted by a second physician responsible for conducting the clinical interview with the patient, in order to provide the sonographer with the necessary clinical information while omitting any details regarding the surgical technique used. For the present study, a stratified randomization design will be adopted. Stratification will be performed according to two clinically relevant variables: patient age (cut-off: 32 years) and maximum endometrioma diameter at preoperative ultrasound assessment (cut-off: 40 mm). These factors were selected because of their potential impact on ovarian reserve and surgical outcomes.

Study Record Dates

• First Submitted: June 19, 2026
• First Posted: June 24, 2026
• Study Start: June 8, 2026
• Primary Completion (Estimated): June 8, 2028
• Study Completion (Estimated): December 8, 2029
• Last Updated: June 24, 2026

Record last verified: 2026-06

Locations

IT (1)