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. 2022 Mar 4;12:847341. doi: 10.3389/fonc.2022.847341

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Copyright © 2022 Wei, Liang, Wang, Li, Chen, Yan, Sun, Huang, Zhong, Liu and Yu

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Endoscopic peritumoral ICG injection one day before surgery. A site adjacent to the tumor is selected. Slight swelling of the mucosa without ICG leakage is a sign of successful injection.