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Levator claviculae muscle: Anatomic variation found during neck dissection.

Fabio Ferreli1, Giuseppe Mercante1, Giuseppe Spriano1

  • 1Department of Otolaryngology-Head and Neck Surgery, Humanitas University, Milan.

The Laryngoscope
|December 20, 2018
PubMed
Summary

The rare levator claviculae muscle, an anatomical variant, was identified during surgery, not just in cadavers. Awareness is crucial for surgeons and radiologists to prevent misinterpretation of neck anatomy.

Keywords:
Levator claviculaeanatomical variationcervical massneck muscle

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Area of Science:

  • Anatomy
  • Surgical Anatomy
  • Human Variation

Background:

  • The levator claviculae muscle is a rare anatomical variant located in the posterior triangle of the neck.
  • This muscle is found in 2% to 3% of the human population.
  • Previously, it was only identified through cadaveric or radiological studies.

Observation:

  • This report details the first intraoperative discovery of the levator claviculae muscle during a modified radical neck dissection.
  • The variant muscle was observed on the left side of the neck.
  • It originated from the transverse processes of the upper cervical vertebrae (C2-C3) and attached to the clavicle.

Findings:

  • The levator claviculae muscle was innervated by the supraclavicular nerve, originating from cervical spinal nerves C3 and C4.
  • The blood supply to this variant muscle was not clearly identified during the surgical procedure.

Implications:

  • This finding highlights the importance of recognizing anatomical variations during surgical procedures.
  • Enhanced awareness among surgeons and radiologists is necessary to avoid misinterpreting the levator claviculae muscle as pathology.
  • Understanding such rare variants improves diagnostic accuracy and surgical planning in neck dissections.