Near Infrared Fluorescent Technique for Sentinel Lymph Node Mapping in Endometrial Cancer
Trial Snapshot
- Phase
- Not Applicable
- Status
- Completed
- Sponsor
- Region Skane
- Enrollment
- 257
- Locations
- 2
- Primary Endpoint
- Detection of sentinel nodes
Study Overview
Brief Summary
In endometrial cancer (EC) pelvic and paraaortic lymphadenectomy is performed only in high risk groups (with approximately 20% of patients having lymph node metastases (LNM)) whereas no lymphadenectomy is recommended in low risk groups despite 5% LNM. Moreover, preoperative risk group allocation is known to be erroneous in up to 15% of patients.
A technique identifying sentinel lymph nodes (SLN) in endometrial cancer have the potential to spare extensive surgery in 80% of high risk patients, identify low risk patients with nodal metastases, diminish side effects caused by full lymphadenectomy and render some expensive preoperative risk group allocation measures unnecessary.
A clinically useful SLN technique requires a high technical success rate, a clear definition of SLN, an algorithm taking into account that metastatic nodes not always accumulate tracer and a reproducible surgical algorithm. A definition of SLN requires knowledge on lymphatic anatomy. Unfortunately all tracers, dyes/radiotracers often result in an abundance of colored/ signaling nodes. Therefore, a definition of a SLN requires identification of efferent/afferent lymph vessels.
Several publications describe sentinel node techniques in EC with a variety of tracers (various dyes, radiotracer, alone or in combination). Sentinel nodes are usually described as "radioactive nodes" or "colored nodes" only with no further discrimination. No study relate to an anatomical description of lymphatic pathways.
The aims of this study is to systematically display the major anatomical pathways with the use of ICG and to evaluate a standardized and reproducible SLN surgical algorithm based on lymphatic anatomy and identification of efferent lymph vessels.
Detailed Description
Endometrial cancer is an increasingly common gynecologic malignancy. The cumulative 5-year survival rate for node negative patients is 94%, 75% in those with metastatic pelvic lymph nodes only and 38% in patients with pelvic and paraaortic metastases. The proportion of node positive patients in adequately staged patient materials (usually high risk groups) is reported in the range of 15-21%. Depending on used risk criteria lymph node metastases occur in 1.5-7.8% in low risk patients. Some studies show better overall survival after pelvic and paraaortic lymphadenectomy, whereas other studies show increased complications with no survival benefit from the lymphadenectomy. Recent articles recommend paraaortic and pelvic lymp node metastases (LND) in high risk EC but the therapeutic value related to potential complications of nodal staging in EC is debated as well as how to define risk groups. An incidence of 0.9-5.2% severe lymphedema and 3.1% chylous ascites requiring treatment has been described after robotic pelvic and paraaortic lymphadenectomy.
The Sentinel node concept has been studied extensively in other cancer forms, for example breast and vulvar cancer. With the above mentioned controversy, patients with EC would benefit tremendously from a functioning Sentinel node concept. Studies using patent blue or radioactive tracer have not shown satisfactory results. The Da Vinci system (da Vinci® Surgical System, Intuitive Surgical Inc., Sunnyvale, Ca, USA) with Firefly technique could make a new concept possible in which major lymphatic drainage can be displayed and learned, hence allowing a standardization of SLN definitions. In our pilot studies, a reproducible surgical algorithm has been defined, overcoming and compensating the fact that ICG spreads quickly to several nodes.
Purpose: To develop a reliable Sentinel node Concept using the Firefly system with ICG in EC patients based on a defined lymphatic anatomy, a clear definition of a sentinel node and a reproducible surgical algorithm.
Hypothesis: The Firefly system using ICG enables the use of a Sentinel node concept in EC patients regardless risk group, so that only patients with pathologically proven lymph nodes metastases undergo a pelvic and paraaortic lymphadenectomy.
Methods of Research:
Study Design
- Study Type
- Interventional
- Allocation
- Na
- Intervention Model
- Single Group
- Primary Purpose
- Diagnostic
- Masking
- None
Eligibility Criteria
- Ages
- 18 Years to — (Adult, Older Adult)
- Sex
- Female
- Accepts Healthy Volunteers
- No
Inclusion Criteria
- •Planned robotic operation due to endometrial carcinoma
- •Patient suitable for laparoscopic surgery
- •Signed consent
Exclusion Criteria
- •No consent
- •Inability to understand study information
- •surgical or anesthesiological contraindication for laparoscopic surgery
- •previous lymphatic problems
- •iodine allergy iodine
- •disseminated disease
Arms & Interventions
Sentinel node procedure
Enrolling all eligible endometrial cancer patient to the Sentinel node concept using indocyanine green.
Intervention: Sentinel node procedure (Procedure)
Outcomes
Primary Outcomes
Detection of sentinel nodes
Time Frame: up to 2 months
The study measures the sensitivity of the described Sentinel node concept regarding the detection of Sentinel lymph nodes and detection of lymph node metastases
Detection of Sentinel nodes
Time Frame: up to 2 months
The study measures the specificity of the described Sentinel node concept regarding the detection of Sentinel lymph nodes and detection of lymph node metastases
Detection of Setinel nodes
Time Frame: up to 2 months
The study measures the false negative rate of the described Sentinel node concept regarding the detection of Sentinel lymph nodes and detection of lymph node metastases
Secondary Outcomes
- Recurrence rates(up to 24 months after inclusion)
- Lymphatic complications(up to 24 months after inclusion)