We read the recently published article “Dynamic Ultrasound Imaging of the Brachial Plexus for Diagnosis of Thoracic Outlet Syndrome” by Chang et al.¹ They present a case of a patient who had numbness over the whole palm that first started developing in the hypothenar area. Ultrasonography of the brachial plexus revealed an early separation of the lateral cord from the posterior and the medial cords, proximal to the entrance of the brachial plexus to the costoclavicular space. After passing beneath the clavicle, the lateral cord was interposed between the subclavius muscle and the subclavian artery. When the patient abducted the shoulder to more than 90⁰, the lateral cord became impinged between the subclavius muscle and the subclavian artery. Based on this finding, the patient was diagnosed with thoracic outlet syndrome due to the anatomic variance of the brachial plexus. However, we have some concerns regarding their diagnosis.

中文翻译：

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关于 Ke-Vin Chang 等人的“用于诊断胸廓出口综合征的臂丛神经的动态超声成像”

我们阅读了 Chang 等人最近发表的文章“用于诊断胸廓出口综合征的臂丛神经的动态超声成像”。¹他们介绍了一个患者的案例，他的整个手掌麻木，最初在小鱼际区域开始发展。臂丛神经的超声检查显示外侧束与后束和内侧束早期分离，靠近臂丛进入肋锁间隙的入口。在通过锁骨下方后，外侧索被插入锁骨下肌和锁骨下动脉之间。当患者将肩部外展到 90 ⁰ 以上时，外侧索会在锁骨下肌和锁骨下动脉之间发生撞击。基于这一发现，该患者被诊断为由于臂丛神经解剖变异导致的胸廓出口综合征。然而，我们对他们的诊断有一些担忧。