Non recurrent laryngeal nerve: be vigilant

Authors

  • Preeti Dhingra Department of ENT and Head Neck Surgery, Lilavati Hospital and Research Centre, Mumbai, Maharashtra, India
  • Kaustubh Raghuwanshi Department of General Surgery, Lilavati Hospital and Research Centre, Mumbai, Maharashtra, India
  • Sirigiri Naga Mahendra Department of General Surgery, Lilavati Hospital and Research Centre, Mumbai, Maharashtra, India
  • Ritesh Agrawal Department of Endocrine Surgery, Lilavati Hospital and Research Centre, Mumbai, Maharashtra, India

DOI:

https://doi.org/10.18203/issn.2454-5929.ijohns20241333

Keywords:

Trachea, NRLN, Vagus nerve

Abstract

The nonrecurrent laryngeal nerve (NRLN) is a rare variant of the RLN, which results from the partial failure of pharyngeal apparatus during embryological development. It’s a rare anatomical variation in which the nerve doesn’t descend to the thorax and enters the larynx directly from the vagus nerve in the neck. It’s an uncommon anatomical variation usually associated with subclavian artery abnormalities, so identification of these vascular anomalies before the surgery is important to avoid nerve injury. These anomalies lead to difficulty in finding the RLN and hence the chances of injury to the nerve are more. Lack of knowledge about the course of RLN, its anatomical variations and its relationship to the vital structures poses the risk of iatrogenic damage of the nerve. Most of the cases of NRLN are diagnosed intraoperatively, as there is no specific test for this. So, surgeons should always be vigilant about the NRLN during thyroid and parathyroid surgeries.

References

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Chatterjee C, Bharti B, Bhavana K, Bharathi G. Non-recurrent laryngeal nerve: An anatomical variation in thyroid surgery. J Clin Images Med Case Rep. 2024;5(1):2779.

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Published

2024-05-24

Issue

Section

Case Reports