Study on the Ultrasound and Biological Characteristics of Atypical Endometriosis. (ENDOAT)

September 7, 2026 updated by: Casa di Cura Dott. Pederzoli

Endometriosis "Atypical" and Cancerized: Anatomopathological and Clinical-instrumental Characterization on the Ultrasound and Biological Characteristics of Atypical Endometriosis.

This study hypothesizes that the histological, immunophenotypic, and molecular characterization of atypical endometriotic lesions may be related to specific clinical and ultrasound features.Identifying potentially atypical lesions would allow for more accurate stratification of patients, distinguishing definitely benign from potentially atypical endometriosis.

The targeted study of endometriosis, both typical and atypical, also with reference to the inflammatory microenvironment, as well as immunophenotypic and molecular characteristics, could allow the formulation of pathogenic hypotheses on the development and progression of atypia towards malignant neoplasms.

Study Overview

Detailed Description

Observational, retrospective-prospective, cross-sectional, single-center study conducted on patients undergoing laparoscopic surgery for benign or malignant pathology (endometrial or ovarian). The study does not include changes to the standard care pathway and all procedures are in normal clinical practice. The indication for surgical treatment is formulated on the basis of the most up-to-date guidelines on the subject. The study includes two phases:

  • Single-center observational retrospective study with case collection starting June 2024
  • Single-center prospective observational study with recruitment of new cases for 30 months after the start of the project.

At the time of the pre-hospitalization visit, the patient will be clearly and understandably illustrated with the rationale and objective of the study, the planned procedures (which do not deviate from normal clinical practice) and the data that are intended to be collected for each patient. There are four groups under comparison: patients with endometriosis without atypia and patients with neoplasia not associated with endometriosis represent the "controls", while patients with atypical endometriosis and patients with cancerized endometriosis or neoplasia associated with endometriosis represent the "cases". Patients with ovarian / endometrial neoplasia not associated with endometriosis will serve as a control for both the ultrasound appearance of the lesions and for anatomopathological analysis (including immunohistochemical and molecular investigations).

Patients included in the study will undergo a level II gynecological ultrasound with transvaginal technique by experienced operators, the images will be reviewed by two experienced operators.

Patients will be operated on by operators experienced in endometriosis surgery. The anatomopathological diagnostic report will be structured sec. International Collaboration on Cancer Reporting (ICCR) (Annexes 1 and 2), which includes essential elements ("core"), and optional elements ("non-core") (https://www.iccr-cancer.org/).

Each case will be evaluated individually and then in doubles by two anatomopathologists experienced in gynecological pathology.

The immunohistochemical and molecular panel are routinely performed in patients with atypical endometriosis, cancerized endometriosis, or endometriosis-associated neoplasia and in neoplasms not associated with endometriosis, therefore the performance of these procedures does not deviate from such clinical practice. In patients with endometriosis "typical", a reduced panel will be performed, if deemed necessary by the pathologist, particularly if there are dubious morphological pictures.

Study Type

Observational

Enrollment (Estimated)

200

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

    • Verona
      • Peschiera del Garda, Verona, Italy, 37019
        • Recruiting
        • Ospedale P. Pederzoli Casa di Cura Privata S.p.A.
        • Contact:

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Sampling Method

Probability Sample

Study Population

patients undergoing laparoscopic surgery for benign or malignant (endometrial or ovarian) pathology

Description

Inclusion Criteria:

  • Age > 18 years
  • Candidate patients for endometriosis surgery with deep endometriosis (intestine, LUS) and/or endometrioma localizations.
  • Patients who are candidates for surgery for established or suspected endometrial and/or ovarian neoplasm
  • Patients who have performed a level II gynecological ultrasound with an experienced operator in the preoperative process.
  • Patients where there is the technical possibility of performing a transvaginal and/or transrectal ultrasound and the patient's willingness to undergo such an investigation.
  • Signing of informed consent.

Exclusion Criteria:

  • Technical impossibility of performing a transvaginal ultrasound (patient virgo, patient refusal).
  • Previous neoplasms
  • Patient who does not provide their informed consent.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
prospective observational group
Single-center prospective observational study with recruitment of new cases for 30 months from the start of the project.
retrospective observational group
Single-center observational retrospective study with case collection starting June 2024

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Identification of specific histopathological, immunohistochemical and molecular biology features for definable "atypical", "preneoplastic" or "cancerized-neoplastic" lesions and the surrounding microenvironment
Time Frame: through study completion, an average of 1 year
through study completion, an average of 1 year

Secondary Outcome Measures

Outcome Measure
Time Frame
Identification of specific ultrasound features of lesions described in histological examination as "atypical", "preneoplastic", or "cancerized-neoplastic"
Time Frame: through study completion, an average of 1 year
through study completion, an average of 1 year

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

October 1, 2026

Primary Completion (Estimated)

January 1, 2029

Study Completion (Estimated)

June 1, 2029

Study Registration Dates

First Submitted

September 7, 2026

First Submitted That Met QC Criteria

September 7, 2026

First Posted (Actual)

September 11, 2026

Study Record Updates

Last Update Posted (Actual)

September 11, 2026

Last Update Submitted That Met QC Criteria

September 7, 2026

Last Verified

September 1, 2026

More Information

Terms related to this study

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

Subscribe