<prompt> Most common nerve injury associated with thyroid surgeryRight recurrent laryngealLeft recurrent laryngealRight internal laryngealExternal branch of superior laryngeal nerve  <response>: .The external branch of the superior laryngeal nerve EBSLN is at risk of injury during thyroid operations when dissection of the superior pole and ligation of the superior thyroid vessels STV are carried out. From that perspective, EBSLN injury poses a threat to handicap all patients undergoing thyroid operations. ref Robbins 9e pg 345 