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Variable relationship of the recurrent laryngeal nerve to the inferior thyroid artery: A meta‐analysis and surgical implications
Author(s) -
Henry Brandon Michael,
Vikse Jens,
Graves Matthew J.,
Sanna Silvia,
Sanna Beatrice,
Tomaszewska Iwona M.,
Hsieh Wan Chin,
Tubbs R. Shane,
Tomaszewski Krzysztof A.
Publication year - 2017
Publication title -
head and neck
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.012
H-Index - 127
eISSN - 1097-0347
pISSN - 1043-3074
DOI - 10.1002/hed.24582
Subject(s) - neurovascular bundle , medicine , recurrent laryngeal nerve , meta analysis , thyroid , thyroid cartilage , subgroup analysis , superior thyroid artery , larynx , anterior cerebral artery , surgery , anatomy , middle cerebral artery , ischemia
Abstract 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 39: 177–186, 2017