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Clinical Trial Summary

Epithelial ovarian cancer (EOC) diagnosed in the initial stage (stage I-II) require complete staging surgery to histologically assess the possible existence of peritoneal or lymph node disease. Systematic pelvic and paraaortic lymphadenectomy in stage I-II EOC is essential since confirming the presence of lymph node metastases means re-staging the disease as stage III. This change of stage has important prognostic and therapeutic implications. However, the lymph node involvement rate is around 10-30% (average of 15%). Systematic pelvic and para-aortic lymphadenectomy carries a risk of intraoperative complications, as well as longer operative time, postoperative complications and longer hospital stay. Moreover, by now there is no evidence suggesting a possible therapeutic value. The sentinel lymph node (SLN) detects the first level of lymph node drainage. The absence of metastases in the SLN predicts the absence of tumor infiltration of the rest of lymph nodes of the same anatomical region and allows to safely avoid lymphadenectomy and its associated morbidity. In addition, the exhaustive evaluation of the SLN by ultrastaging and immunohistochemical study allows to increase the detection of microscopic disease. Sentinel lymph node (SLN) biopsy, implemented in clinical practice in other gynecological tumors (breast, vulva, cervix or endometrium), has been studied very little in the initial ovarian epithelial cancer. Unlike other gynecological tumors, there are multiple anatomical and technical aspects that largely explain this lack of information. The double ovarian vascularization that accompanies lymphatic drainage explains this higher complexity. Therefore, at the present time, the detection of SLN in the initial EOC remains an experimental area without applicability in clinical practice. There are multiple doubts and issues to be resolved regarding the different tracers, the site and time injection and the actual accuracy of the SLN versus the lymphadenectomy.


Clinical Trial Description

The objective of this study is to know the lymphatic drainage and, if the lesion is malignant, remove the sentinel lymph nodes to know if it can predict the involvement of the remaining lymph nodes to assess the possible applicability of SLN in clinical practice. Study design: 1. Evaluation of the ovarian lymphatic map: injection of radiotracer (99mTc-nanocolloid albumin) in patients with a diagnosis of adnexal mass with high suspicion of malignancy. Intraoperative lymphogammagraphy will be performed using a portable gammacamera. Patients with a delayed diagnosis of ovarian cancer who are candidates to undergo a re-staging surgery will be included. 2. After the adnexectomy a frozen section will be performed to confirm the diagnosis of malignancy and then the ICG (Indocyanine green) tracer will be injected. Since the spread and persistence of the ICG in the lymph nodes is rapid, this tracer will be injected only after confirmation of EOC. Simultaneous screening with a gammadetector probe and NIR (near-infrared spectrum) camera will be used to proceed to the detection of SLN according to the lymphatic map previously. 3. Ultrastaging of the SLN by applying hematoxylin and eosin staining (H&E) and, in the absence of metastatic disease, evaluation by immunohistochemistry with cytokeratin AE1: AE3. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT05184140
Study type Interventional
Source Hospital Clinic of Barcelona
Contact Núria Agustí, MD
Phone +34 932 27 54 00
Email [email protected]
Status Recruiting
Phase N/A
Start date January 1, 2021
Completion date January 1, 2023

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