Tubercle | Of Zuckerkandl

Because the TZ extends posteriorly, a nodule located within it may be obscured by the main body of the thyroid on standard ultrasound views. Surgeons should be wary of "discrepancies" between preoperative ultrasound findings and intraoperative palpation, as posterior nodules in the TZ are easily missed on imaging but palpable during surgery.

The Tubercle of Zuckerkandl is not an anatomical curiosity but a in thyroid surgery. Its consistent relationship with the recurrent laryngeal nerve makes it invaluable for nerve preservation. Additionally, its role as a reservoir of C-cells links it directly to medullary thyroid carcinoma. Every thyroid surgeon and endocrinologist should be familiar with its anatomy, variations, and clinical implications. tubercle of zuckerkandl

During thyroidectomy, if the surgeon dissects along the lateral aspect of the thyroid without identifying this posterior projection, the RLN is at high risk of transection or traction injury. The TZ effectively hides the nerve, making the nerve’s identification laterally difficult until the tubercle is mobilized. Because the TZ extends posteriorly, a nodule located