During a left hemithyroidectomy, the surgeon identifies the recurrent laryngeal nerve (RLN) entering the larynx posterior to the cricothyroid joint. Which of the following accurately describes the relationship of the RLN to the inferior thyroid artery at this point?

• A The RLN always passes anterior to the inferior thyroid artery
• B The RLN always passes posterior to the inferior thyroid artery
• C The RLN is not related to the inferior thyroid artery on the left side
• D The RLN may pass anterior, posterior, or between branches of the inferior thyroid artery ✓

Explanation

The relationship of the recurrent laryngeal nerve to the inferior thyroid artery is highly variable and is the most critical anatomical consideration in thyroid surgery. The RLN may pass anterior to, posterior to, or interdigitate between the branches of the inferior thyroid artery. This variability applies to both sides, though patterns differ slightly. The RLN must be identified and traced before ligating the inferior thyroid artery; the artery should be ligated close to the thyroid gland (distal to the RLN crossing) to minimize nerve injury risk.

Reference: Bailey & Love's Short Practice of Surgery, 27th ed.

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Written and medically reviewed by the StethoPrep medical team.