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

Q3 Medicine Acta medica academica Pub Date : 2022-12-01 DOI:10.5644/ama2006-124.391

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

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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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肥大的前斜角肌和锁骨下动脉通过其纤维的通道:可能夹持的位置。

目的:颈肋、第一肋骨异常、颈肌肥大和重复运动是锁骨下动脉(SCA)夹陷和/或压迫的可能病因。动脉型胸廓出口综合征可出现由于压迫的SCA的动脉瘤部分而引起的手部疼痛症状。目前的尸体病例描述了肥厚的右侧前斜角肌(ASM)和通过其纤维的右侧SCA (RSCA)可能被困住。此外，还分析了被困血管的分支模式。病例报告:在希腊男性捐献尸体(70岁)的右侧锁骨下区域发现了肥厚的ASM。RSCA穿过ASM腹部，一些位于深部的纤维向后延伸到RSCA。ASM将RSCA压在第一肋骨的上部。结论:了解这些变异可能对上肢肌肉萎缩或神经感觉丧失的诊断有重要意义。

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