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Introduction
The sentinel lymph node (SLN) is defned as the frst lymph node
receiving lymphatic drainage from the breast and represents the actual
nodal status.
1
Currently, SLN biopsy is a routine procedure for early
stage breast cancer. SLN biopsy is based on an ordered dissemination
of tumor cells from peritumoral lymphatics to the SLN, and then to
more distant lymph nodes.
2
Clinical identifcation of these nodes is
usually performed by injecting a blue dye and a radioisotope into
the peritumoral site. Labeled lymph nodes are surgically excised and
histologically examined for the presence of disease.
1
Identifcation
and biopsy of the SLN can correctly indicate the status of the draining
lymph node basin. Nowdays SNL biopsy is the standard of care for
staging the axilla and and decreases the morbidity related to axillary
lymphadenectomy (LND).
2
The most important aspect of SLN biopsy is appropriate selection
of patients that will beneft from this minimally invasive procedure.
2
Axillary lymph node status is the most important prognostic factor
for early-stage breast cancer. The orderly spread of breast carcinoma
theory came into question with publication of the prospective NSABP
B-04 Trial in which it was reported that the addition of LND to
mastectomy had no efect on disease-free survival or overall survival.
3
Those fndings indicate that the disease might already be systemic
when it disseminates to regional lymph nodes. Nevertheless, regional
lymph node status is critically important for precisely tailoring
adjuvant treatment and evaluating prognosis.
1
The performance of SLN depends signifcantly on surgeon
experience. Currently the gold standard for SLN biopsy is by using
a blue dye and lymphoscintigraphy with a radioisotope (RI), usually
technetium (Tc-99m). Generally Tc-99m is injected into the ipsilateral
subareolar plexus.
1
The RI method requires expensive equipment,
authorized radiation protection areas, and access of the nuclear
medicine department to RI. These logistic and legislative issues limit
SLN biopsy using RI to high-volume centers in developed countries.
Since there are some logistical problems as the ones mentioned before,
researchers are looking for alternative markers, such as indocyanine
green (ICG).
4
The near-infrared (NIR) fuorescence imaging system uses the
characteristic fuorescence spectra of ICG within an optical window.
NIR/ICG fuorescence imaging visualizes subcutaneous lymphatic
fow and allows the surgeon to directly observe the axillary fuorescent
SLN. Although the fuorescence of ICG cannot be directly visualized
with the naked eye, it can be confrmed on the monitor in real-time
through a platform for near-infrared fuorescence imaging which is
less expensive than RI method.
4
The ICG fuorescence method has valid diagnostic performance
for SLN detection. This technique shows a trend toward better
axilla staging and may be a useful alternative to RI for SLN biopsy.
Several recent meta-analyses demonstrated that ICG-guided SLN
biopsy achieved a high detection rate for SLN and was viable for the
detection of SLN metastasis.
5
We present our serie of cases performing the ICG fuorescence
method as an alternative way to identify the SNL, using the technology
VS3 Iridium in EleVision™ IR platform (Medtronic, Minneapolis
MN) that ofers high-defnition visualization with fuorescence
imaging. VS3 Iridium is designed to work with ICG which has
excitation at 805 nm and emission band between 825 nm and 850 nm.
VS3 Iridium provides excitation light to the surgical feld to excite
the dye molecules and captures emission from the ICG using an IR
sensitive camera, and the Elevision
TM
platform has the capacity to
electronically transform the image to green color.
Methods
Patients
Between June 2019 and August 2022, a total of 70 consecutive
patients with proven invasive breast cancer (T1-T2) and clinically
node negative breast cancer (N0) were enrolled to undergo SLNB for
localization using ICG at Pacífca Salud Hospital. All patients were
diagnosed with breast cancer by core needle biopsy. Exclusion criteria
included the following: defnite lymph node metastasis diagnosed by
ultrasonography or biopsy and adverse reaction or allergy to ICG. The
study was conducted in a single institution, where all procedures were
J Cancer Prev Curr Res. 2022;13(5):125‒127. 125
©2022 Cukier et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which
permits unrestricted use, distribution, and build upon your work non-commercially.
Sentinel node identifcation with indocyanine green
in early stage breast cancer in a multi-ethnic Latin
American population
Volume 13 Issue 5 - 2022
Moises Cukier, Homero Rodríguez-Zentner,
Emmy Arrue
Division of General Surgery, Department of General Surgery,
Pacifca Salud Hospital, Panama City, Panama
Correspondence: Moises Cukier, Division of General Surgery,
Department of General Surgery, Pacifca Salud Hospital,
Consultorios Punta Pacifca, 4t foor, offce 407, Blvd Pacífca
S/N, Panama, Rep of Panama, Tel +(507) 62081664,
Email
Received: September 17, 2022 | Published: September 29,
2022
Abstract
Background/Aim: The purpose of this series of cases was to describe the use and feasibility
of indocyanine green (ICG) fuorescence for localization of sentinel lymph node in early-
stage breast cancer.
Methods and patients: Sentinel lymph node biopsy using indocyanine green with
fuorescence guided surgery using Medtronic’s EleVision™ IR platform, was performed on
a total of 70 consecutive patients.
Results: ICG successfully identifed all 87 lymph nodes excised in 70 surgeries. With a
detection rate of 97.14%, the ICG method detected an average of 1.42 SLNs in 68 of 70
patients.
Conclusion: Therefore, ICG fuorescence method is safe and efective addition in early
breast cancer clinical staging.
Journal of Cancer Prevention & Current Research
Research Article
Open Access