Zuckerkandl's tubercle is a posterior projection of thyroid tissue that is clinically important because:
- A It serves as a landmark for identifying the RLN at the junction with the Berry's ligament ✓
- B It is the most common site of ectopic parathyroid gland
- C It marks the location of the recurrent laryngeal nerve entry into the cricothyroid muscle
- D It is the remnant of the thyroglossal duct and may harbor papillary carcinoma
Correct answer: A. It serves as a landmark for identifying the RLN at the junction with the Berry's ligament
Explanation
Zuckerkandl's tubercle is a posterior lateral extension of the thyroid lobe that is a reliable surgical landmark for the recurrent laryngeal nerve. The RLN typically passes medial to or just deep to Zuckerkandl's tubercle near Berry's ligament. Identifying this structure during thyroid surgery guides safe RLN dissection and reduces inadvertent nerve injury. It is not related to the thyroglossal duct remnant or ectopic parathyroid tissue.
Reference: Bailey & Love's Short Practice of Surgery, 27th ed.
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Written and medically reviewed by the StethoPrep medical team.