Carrera Ana, Chaiyamoon Arada, Reina Francisco, Iwanaga Joe, Cateura Aida, Reina Miguel Angel, Sañudo José Ramón, Tubbs R Shane
Department of Medical Sciences, Clinical Anatomy, Embryology and Neuroscience Research Group (NEOMA), Faculty of Medicine, University of Girona, Girona, Spain.
Department of Anatomy, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand.
Anat Cell Biol. 2023 Jun 30;56(2):280-284. doi: 10.5115/acb.23.004. Epub 2023 Mar 20.
Upper limb muscle variations can be encountered on imaging or at surgery. We report an unusual muscle and band found during routine dissection of the arm in a cadaver. This case is described and salient literature reviewed. A band was found that traveled from the insertion of the pectoralis major tendon distally and obliquely toward the medial intermuscular septum and medical epicondyle. Fibers of the brachialis were found to interdigitate into the band. A tunnel was formed that carried the median nerve and brachial vessels. Evidence of median nerve compression was observed. We considered this an example of a pectorobrachioepicondylaris muscle. However, some can lead to clinical presentations. Although the significance of the case reported herein is not certain, signs of median nerve compression were identified. We believe that the term pectorobrachioepicondylaris bests describes the muscle reported herein and that our case represents a previously unreported variant of this muscle.
上肢肌肉变异可在影像学检查或手术中发现。我们报告了在一具尸体手臂的常规解剖过程中发现的一块不寻常的肌肉和束带。本文描述了该病例并回顾了相关重要文献。发现一条束带从胸大肌腱的止点向远端斜行至内侧肌间隔和内上髁。发现肱肌纤维交错进入该束带。形成了一个容纳正中神经和肱血管的通道。观察到正中神经受压的迹象。我们认为这是胸肱上髁肌的一个例子。然而，有些变异可能导致临床表现。尽管本文报道病例的意义尚不确定，但已发现正中神经受压的体征。我们认为胸肱上髁肌这个术语最能描述本文报道的肌肉，并且我们的病例代表了该肌肉以前未报道过的变异型。
