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ESBLN can be identified intraoperatively in Joll’s triangle which is bounded by cricothyroid and inferior constrictor medially, sternothyroid muscle anteriorly, and upper pole of thyroid laterally. CTM: Cricothyroid muscle, EBSLN: External branch of the superior laryngeal nerve, ICM: Inferior constrictor muscle, SPT: Superior pole of the thyroid gland, STA: Superior thyroid artery, STM: Sternothyroid muscle, Joll’s: Joll’s triangle
