Skip to main content
OpenTrials
Active, Not Recruiting

NCT Number: NCT07311278

Identification of Sentinel Lymph Nodes Using Indocyanine Green in Breast Cancer Patients

This study aims to evaluate the (inter)national implementation of a new diagnostic method for sentinel lymph node (SLN) detection in breast cancer. While Technetium-99m (99mTc) is the current gold standard for SLN detection, it has drawbacks such as limited availability, logistical challenges, radiation exposure, and potential side effects. Extensive research indicates that Indocyanine Green (ICG) is an equally effective and potentially more practical alternative. Conducting this study will help accelerate the implementation of ICG in clinical practice.

Active, Not Recruiting

This study is active but is not currently recruiting participants.

Notify Me

Key information

Age range

18 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Ospedale Pederzoli, Peschiera del Garda, Italy

Loading trial locations.

About this study

An important part of oncological treatment for breast cancer is determining the lymph node status. A commonly used method for this is the sentinel lymph node (SLN) procedure. Analysis of this node plays a key role in determining both treatment and prognosis.

Currently, the gold standard for SLN localization is the use of Technetium-99m (99mTc). However, this method has several disadvantages. Since not every hospital has a Nuclear Medicine Department, patients often need to be referred to another facility for 99mTc injection and nuclear imaging. This process can be burdensome for patients and poses logistical challenges when scheduling surgeries. In addition, the use of 99mTc involves exposure to radioactive material, and adverse effects such as allergic reactions have been reported. Recent studies have shown that the use of Indocyanine Green (ICG) is equally effective for sentinel lymph node localization as Technetium.

The aim of this study is to evaluate the national and international implementation process of a new diagnostic method for SLN detection.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Clinically node-negative, DCIS or invasive breast cancer confirmed by biopsy
  • Preoperative axillary ultrasound to confirm clinical node-negative status
  • Indication for breast cancer surgery with SLNB via axillar incision
  • Written informed consent according to ICH/GCP and national regulations.

Exclusion criteria

  • Patients < 18 years old.
  • Indication for breast cancer surgery with SLNB via mastectomy incision
  • Combined MARI procedure
  • Known allergy for Indocyanine Green (ICG) or intravenous contrast or iodine
  • History of axillary lymph node dissection
  • Hyperthyroidism or thyroid cancer
  • Pregnancy or breast-feeding
  • Psychological, familial, sociological or geographical factors that could potentially hamper compliance with the study protocol

Treatment and study plan

Phase I: Technetium is administered as single tracer to identify the SLN (current standard).

Procedure

During this phase, surgeons will use technetium to identify the SLN as this is the current standard of care. This phase will serve as a control group.

Phase II: SLN biopsy using double tracer technetium and ICG (learning curve)

Procedure

During this phase, surgeons will primarily use ICG to identify the sentinel lymph node (SLN), while technetium will serve as a control. This approach allows surgeons to gain proficiency with ICG-guided SLN biopsy and safely advance through the learning curve.

Phase III: ICG is administered as single tracer to identify the SLN (alternative method).

Procedure

During this phase, surgeons will use ICG as a singe tracer to identify the SLN.

Primary outcomes

  1. Identifaction rate

    Time frame: Perioperatively

    Identification rate is defined as the proportion of patients in whom lymph nodes were identified with the gamma-probe using technetium or the fluorescent signal of ICG.

Secondary outcomes

  1. Number of lymph nodes identified

    Time frame: Perioperatively

    This indicates the total number of lymph nodes identified with ICG or technetium.

  2. Percentage of SLNs identified per tracer

    Time frame: Perioperatively

    Percentage of SLNs that had technetium uptake / were fluorescent.

  3. Pathology assesment per SLN

    Time frame: Perioperatively

    The pathology of the identified SLN during surgery

  4. Detection time

    Time frame: Intraoperatively

    Time in minutes to excise the SLN, measured from start of SLN procedure until detection of the first SLN.

  5. Complications

    Time frame: From the time of the SLN procedure up until three weeks of follow-up.

    Complications including (wound)infection, bleeding, seroma, and mild allergic reaction.

  6. Adverse events

    Time frame: Monitored during study period until one year of follow-up

    Number of adverse events attributable to technetium or ICG.

  7. Locoregional recurrence at 1 year follow-up

    Time frame: Until the end of the study (after 1 year of follow-up)

  8. Surgeon's expectations regarding ICG

    Time frame: Pre-implementation (prior to the transion phase)

    Expectations of the participating surgeons regarding the use of ICG for SLN procedure using a study-specific survey with open-ended questions and multiple choice items.

  9. Surgeons' experiences regarding ICG

    Time frame: Up to 12 months after transition to ICG as single tracer

    Experiences of the participating surgeons regarding the use of ICG for SLN procedure using a study-specific survey with open-ended questions and multiple choice items.

  10. Learning curve per surgeon

    Time frame: From each surgeon's first procedure using the double tracer method (technetium and ICG) through completion of the transition phase, assessed over up to 12 months.

    The learning curve process will be expressed by visualizing inter-surgeon variability in the number of procedures required to achieve proficiency portrayed in a scatterplot.

Sponsors and collaborators

Lead sponsor

St. Antonius Hospital

Other

Registry information

Official study title

Identification of Sentinel Lymph Nodes in Breast Cancer Patients Through Non-invasively Fluorescent Imaging Using Indocyanine Green: an International Multicenter Implementation Study.

Acronym: INFLUENCE II

Important dates

Study start
2023
Primary completion
2025
Study completion
2026
First posted
Dec 30, 2025
Registry last updated
Dec 30, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

Published trials that share one or more normalized conditions with this study.