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Published in: Surgical Endoscopy 6/2022

01-06-2022 | Metastasis

Near-infrared fluorescence imaging-guided lymphatic mapping in thoracic esophageal cancer surgery

Authors: Xiaojin Wang, Yi Hu, Xiangwen Wu, Mingzhu Liang, Zhenhua Hu, Xiangfeng Gan, Dan Li, Qingdong Cao, Hong Shan

Published in: Surgical Endoscopy | Issue 6/2022

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Abstract

Purpose

Identifying the lymphatic drainage pathway is important for accurate lymph node (LN) dissection in esophageal cancer (EC). This study aimed to assess lymphatic drainage mapping in thoracic EC using near-infrared fluorescent (NIRF) imaging with indocyanine green (ICG) and identify its feasibility for intraoperative LN drainage visualization and dissection.

Methods

From November 2019 to August 2020, esophagectomy was performed using intraoperative NIRF navigation with ICG injected into the esophageal submucosa by endoscopy. All LNs were divided into four groups according to the NIRF status and presence of metastasis: NIRF+LN+, NIRF+LN, NIRFLN+, and NIRFLN.

Results

Regional LNs were detected in all 84 enrolled patients with thoracic EC. A total of 2164 LNs were removed, and the mean number of dissected LNs was 25.68 ± 12.00. NIRF+ LNs were observed in all patients and distributed at 19 LN stations, which formed lymphatic drainage maps. The top five LN stations of NIRF+ probability in upper thoracic EC were No. 7, 106ecR, 107, 1, and 106recL; in middle thoracic EC, they were No. 107, 7, 110, 1, and 105; and in lower thoracic EC, they were No. 107, 7, 110, 106recR, and 1. There were no cases of ICG-related adverse events or chylothorax. The 30-day mortality rate was 0%. Major complications included anastomotic fistula (7.14%), pneumonia (4.76%), pleural effusion (13.10%), atelectasis (3.75%), hoarseness (8.33%), and arrhythmia (4.76%).

Conclusion

Regional LN mapping of thoracic EC was performed using ICG/NIRF imaging, which showed different preferred LN drainage stations in various anatomical locations of the thoracic esophagus. ICG/NIRF imaging is feasible for intraoperative LN drainage visualization and dissection.

Clinical trial registration

The clinical trial registration number is NCT04173676 (http://​www.​clinicaltrials.​gov/​).
Literature
Metadata
Title
Near-infrared fluorescence imaging-guided lymphatic mapping in thoracic esophageal cancer surgery
Authors
Xiaojin Wang
Yi Hu
Xiangwen Wu
Mingzhu Liang
Zhenhua Hu
Xiangfeng Gan
Dan Li
Qingdong Cao
Hong Shan
Publication date
01-06-2022
Publisher
Springer US
Published in
Surgical Endoscopy / Issue 6/2022
Print ISSN: 0930-2794
Electronic ISSN: 1432-2218
DOI
https://doi.org/10.1007/s00464-021-08720-7

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