Comparison of Ultrasound-determined and Intraoperative #Enzian-classification in Patients With Deep Endometriosis

Study Overview
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Brief Summary
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The Enzian classification, which was developed in order to describe deep endometriotic (DE) lesions, is determined intraoperatively by the surgeon. Transvaginal ultrasound (TVS) examination is considered as the first-line imaging technique for endometriosis. The aim of this study is to compare the assessment of presence and severity grade of endometriotic lesions in different #Enzian compartments by a preoperative ultrasound examination to the definitive intraoperative Enzian classification using the latest revision of the Enzian classification (#Enzian).

Detailed Description
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Endometriosis is a common disease with endometriotic lesions being found in the ovaries, peritoneum, or as deep endometriosis (DE) involving different pelvic organs and structures. In order to describe DE lesions, the Enzian classification was developed. In the last revision of this Enzian classification, the so-called #Enzian, presence and severity grades of ovarian and peritoneal endometriosis as well as adhesions involving tubes and ovaries are also described in addition to DE lesions. The Enzian classification is determined intraoperatively by the surgeon. Transvaginal ultrasound (TVS) examination is considered to be the first-line imaging technique for this disease. Therefore, the aim of this study is to compare the assessment of presence and severity grade of endometriotic lesions in different #Enzian compartments by a preoperative ultrasound examination (in the form of an US-#Enzian classification) to the definitive intraoperative Enzian classification (OP-#Enzian) using the latest revision of the Enzian classification (#Enzian).

Official Title
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Comparison of a Preoperative Ultrasound-determined and the Intraoperative #Enzian-classification in Patients With Deep Endometriosis (DE)

Conditions
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Endometriosis

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: All women who are scheduled for a radical surgical treatment of deep endometriosis (DE) and who undergo preoperative evaluation by transvaginal sonography (TVS) Exclusion Criteria: Diagnosed or suspected malignancy Previous colorectal surgery or previous surgery for DE including full thickness bowel resection, vaginal resection or excision of a DE lesion involving the urinary bladder Virgo intacta women

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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Female

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Percentages of concordances between preoperative TVS defined #Enzian with the intraoperatively determined #Enzian classification in each #Enzian compartment | The percentages of concordantly described endometriotic lesions including the respective lesion sizes by the preoperative TVS defined #Enzian in each #Enzian compartment will be assessed, with the intraoperatively determined #Enzian classification taken as the reference, i.e. gold standard. | 1 to 7 days | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Sensitivity and specificity for the detection of endometriotic lesions by preoperative TVS examination using #Enzian | Sensitivity and specificity for the detection of endometriotic lesions in different #Enzian compartments by the preoperative TVS examination (#Enzian) will be calculated. | 1 to 7 days | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Endometriosis, Deep endometriosis (DE), Transvaginal sonography (TVS), Enzian classification, #Enzian classification