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Published in: Journal of Cardiothoracic Surgery 1/2024

Open Access 01-12-2024 | Lung Cancer | Research

Clinicopathological factors associated with sentinel lymph node detection in non-small-cell lung cancer

Authors: Christophe Wollbrett, Joseph Seitlinger, Florent Stasiak, Juliette Piccoli, Arthur Streit, Joelle Siat, Guillaume Gauchotte, Stéphane Renaud

Published in: Journal of Cardiothoracic Surgery | Issue 1/2024

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Abstract

Background

Mapping of the pulmonary lymphatic system by near-infrared (NIR) fluorescence imaging might not always identify the first lymph node relay. The aim of this study was to determine the clinicopathologic factors allowing the identification of sentinel lymph nodes (SLNs) by NIR fluorescence imaging in thoracic surgery for non-small-cell lung cancer (NSCLC).

Methods

We conducted a retrospective review of 92 patients treated for suspected or confirmed cN0 lung cancer with curative intent who underwent an intraoperative injection of indocyanine green (ICG) either by direct peritumoral injection or by endobronchial injection using electromagnetic navigational bronchoscopy (ENB). After exclusion of patients for technical failure, benign disease and metastasis, we analyzed the clinicopathologic findings of 65 patients treated for localized-stage NSCLC, comparing the group with identification of SLNs (SLN-positive group) with the group without identification of SLNs (SLN-negative group).

Results

Forty-eight patients (73.8%) were SLN-positive. Patients with SLN positivity were more frequently female (50%) than the SLN-negative patients were (11.8%) (p = 0.006). The mean value of diffusing capacity for carbon monoxide (DLCO) was lower among the patients in the SLN-negative group (64.7% ± 16.7%) than the SLN-positive group (77.6% ± 17.2%, p < 0.01). The ratio of forced expiratory volume in one second to forced vital capacity (FEV1/FCV) was higher in the SLN-positive group (69.0% vs. 60.8%, p = 0.02). Patients who were SLN-negative were characterized by a severe degree of emphysema (p = 0.003). There was no significant difference in pathologic characteristics. On univariate analyses, age, female sex, DLCO, FEV1/FVC, degree of emphysema, and tumor size were significantly associated with SLN detection. On multivariate analysis, DLCO > 75% (HR = 4.92, 95% CI: 1.27–24.7; p = 0.03) and female sex (HR = 5.55, 95% CI: 1.25–39.33; p = 0.04) were independently associated with SLN detection.

Conclusions

At a time of resurgence in the use of the sentinel lymph node mapping technique in the field of thoracic surgery, this study enabled us to identify, using multivariate analysis, two predictive factors for success: DLCO > 75% and female sex. Larger datasets are needed to confirm our results.
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Metadata
Title
Clinicopathological factors associated with sentinel lymph node detection in non-small-cell lung cancer
Authors
Christophe Wollbrett
Joseph Seitlinger
Florent Stasiak
Juliette Piccoli
Arthur Streit
Joelle Siat
Guillaume Gauchotte
Stéphane Renaud
Publication date
01-12-2024
Publisher
BioMed Central
Published in
Journal of Cardiothoracic Surgery / Issue 1/2024
Electronic ISSN: 1749-8090
DOI
https://doi.org/10.1186/s13019-024-02632-y

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