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. 2020 Sep 4;10(9):670. doi: 10.3390/diagnostics10090670

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Extra-laryngeal branching pattern of recurrent laryngeal nerve. This figure demonstrates an example of the different branching patterns of the recurrent laryngeal nerve (RLN) documented in this study. (A) RLN without extra-laryngeal branching, (B) RLN with bifurcation (two branches), (C) RLN with trifurcation (three branches), and (D) RLN with multiple branches (four branches and above). Abbreviations: Es = esophagus, ITA = inferior thyroid artery, RLN = recurrent laryngeal nerve, T = thyroid, Tr = trachea.