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Demonstration of a musculus levator claviculae

Description d'un muscle élévateur de la clavicule

  • Anatomic Variations
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Summary

A musculus levator claviculae, a variant of M. sternocleidomastoideus was identified on the left side of the neck of a 56-year-old man with multiple cervical lymph node metastases from a non-Hodgkin lymphoma of the epipharynx. Its course is shown on CT scans. The superficial part of the muscle in the regio colli lateralis was also seen on inspection of the neck and photographed. A description of this muscle variant and an estimation of its frequency from the literature is provided. This muscle variant is easily recognised as an isolated finding but may not be appreciated in patients with head and neck cancer and multiple enlarged lymph nodes if the muscle is not followed continuously in its course. Rarely this may have an impact on tumour staging or treatment assessment.

Résumé

Le m. élévateur de la clavicule, variante du m. sterno-cléido-mastoïdien, a été idendifié sur la face latérale gauche du cou d'un homme de 56 ans, souffrant d'un lymphome non hodgkinien de la partie nasale du pharynx avec des métastases lymphatiques cervicales multiples. Le trajet musculaire a été mis en évidence sur des coupes tomodensitométriques. La portion superficielle du muscle dans la région latérale du cou a aussi été visualisée à l'examen clinique et photographiée. Cette variante anatomique est décrite et sa fréquence est estimée en fonction des données de la littérature. Celle-ci est facilement reconnaissable quand elle est isolée mais difficilement objectivable chez les patients présentant des cancers de la tête et du cou avec des adénopathies multiples. En revanche, elle a rarement une incidence sur l'estimation du stade tumoral et sur le traitement.

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Rüdisüli, T. Demonstration of a musculus levator claviculae. Surg Radiol Anat 17, 85–87 (1995). https://doi.org/10.1007/BF01629508

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  • DOI: https://doi.org/10.1007/BF01629508

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