During total thyroidectomy for a large goiter, which anatomical relationship of the recurrent laryngeal nerve (RLN) to the inferior thyroid artery is most commonly found at the level of Berry's ligament?

• A RLN always passes posterior to the inferior thyroid artery
• B RLN always passes anterior to the inferior thyroid artery
• C RLN passes between branches of the inferior thyroid artery in the majority ✓
• D RLN is consistently medial to the inferior thyroid artery

Explanation

The relationship of the RLN to the inferior thyroid artery is highly variable, but the most common pattern is the RLN passing between branches (interdigitating) of the inferior thyroid artery, accounting for approximately 40-50% of cases. The RLN can pass posterior (~35%) or anterior (~15%) to the main trunk. This variability necessitates RLN identification and careful visual exposure throughout its course rather than relying on fixed anatomical landmarks. At Berry's ligament, the RLN is closely adherent to the posteromedial thyroid capsule.

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

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Written and medically reviewed by the StethoPrep medical team.