Variable relationship of the recurrent laryngeal nerve to the inferior thyroid artery: A meta-analysis and surgical implications.

Head & Neck

PubMedID: 27627737

Henry BM, Vikse J, Graves MJ, Sanna S, Sanna B, Tomaszewska IM, Hsieh WC, Tubbs RS, Tomaszewski KA. Variable relationship of the recurrent laryngeal nerve to the inferior thyroid artery: A meta-analysis and surgical implications. Head Neck. 2016;.
BACKGROUND
The relationship between the recurrent laryngeal nerve (RLN) and inferior thyroid artery (ITA) is highly variable and traceable back to embryological life.

METHODS
Comprehensive database searches were conducted, followed by judgment of eligibility, assessment, and extraction of data concerning the RLN/ITA relationship. The data were pooled into a meta-analysis and subjected to sex, side-based, geographic origin of study, and study modality subgroup analyses.

RESULTS
Seventy-nine studies (n = 14,269 nerves) reported data on the relationship of the RLN to the ITA. The left versus right-sided comparison revealed stark differences: RLNs were predominantly posterior (62.6% vs 37.0%) and anterior (17.2% vs 37.1%) on the left and right sides, respectively.

CONCLUSION
Symmetry of neurovascular relationships should not be assumed. Extra care should be taken during procedures on the right side, because the nerves are significantly more likely to present in patterns (anterior and between) associated with greater risk of iatrogenic injury. © 2016 Wiley Periodicals, Inc. Head Neck, 2016.