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. 2022 Jun 30;13:923804. doi: 10.3389/fendo.2022.923804

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Copyright © 2022 Huang, Lien, Wang, Wang, Hwang, Shih, Wu, Dionigi, Huang and Chiang

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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A case of type 2 complete LOS. (A) The RLN was stretched upward (white arrow) at the region of Berry’s ligament during medial thyroid traction. (B) After complete RLN dissection, both R_2p and R_2d signals showed complete LOS and no injured point was found on the exposed RLN. This was a type 2 LOS and it developed temporary vocal cord palsy.