A Hypertrophic Anterior Scalene Muscle and the Passage of a Subclavian Artery Through its Fibres: The Location of Possible Entrapment

George  Tsakotos; Vasilios  Karampelias; Ilenia  Chatziandreou; Dimitrios  Philippou; Trifon  Totlis; Maria  Piagkou

doi:10.5644/ama2006-124.391

A Hypertrophic Anterior Scalene Muscle and the Passage of a Subclavian Artery Through its Fibres: The Location of Possible Entrapment

Authors

George Tsakotos Department of Anatomy, Medical School, Faculty of Health Sciences, National and Kapodistrian University of Athens
Vasilios Karampelias Department of Anatomy, Medical School, Faculty of Health Sciences, National and Kapodistrian University of Athens
Ilenia Chatziandreou 1st Department of Internal Pathology, Medical School, Faculty of Health Sciences, National and Kapodistrian University of Athens
Dimitrios Philippou Department of Anatomy, Medical School, Faculty of Health Sciences, National and Kapodistrian University of Athens
Trifon Totlis Department of Anatomy and Surgical Anatomy, Faculty of Health Sciences, Aristotle University of Thessaloniki
Maria Piagkou Department of Anatomy, Medical School, Faculty of Health Sciences, National and Kapodistrian University of Athens

DOI:

https://doi.org/10.5644/ama2006-124.391

Keywords:

Thoracic Outlet Syndrome, Anterior Scalene Muscle, Variant, Compression, Subclavian Artery

Abstract

Objective. The presence of cervical ribs, 1st rib anomalies, cervical muscle hypertrophy and repetitive motion are possible aetiologies of subclavian artery (SCA) entrapment and/or compression. Thoracic outlet syndrome of the arterial type may appear with symptoms of hand pain due to the aneurismal part of the compressed SCA. The current cadaveric case describes a hypertrophic right-sided anterior scalene muscle (ASM) and the possible entrapment of the right SCA (RSCA) passing through its fibres. Furthermore, the branching pattern of the entrapped vessel is analysed.

Case Report. A hypertrophic ASM was identified in the right infraclavicular area of a male Greek donated cadaver (70 years of age). The RSCA passed through the ASM belly, and some deeply situated fibres extended posteriorly to the RSCA. The ASM compressed the RSCA against the superior part of the 1st rib.

Conclusion. Knowledge of such variants may be important in the diagnosis of upper limb muscle atrophy or neurosensory loss.

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Published

2023-03-21

How to Cite

Tsakotos, G. ., Karampelias, V. ., Chatziandreou, I. ., Philippou, D. ., Totlis, T. ., & Piagkou, M. . (2023). A Hypertrophic Anterior Scalene Muscle and the Passage of a Subclavian Artery Through its Fibres: The Location of Possible Entrapment. Acta Medica Academica, 51(3), 212–216. https://doi.org/10.5644/ama2006-124.391