Shah Ishani P, Yadav Amit, Mehta Rujuta, Thatte Mukund
Department of Paediatric Orthopaedics, Mumbai, Maharashtra, India ; Bai Jerbai Wadia Hospital for Children, Mumbai, Maharashtra, India.
Department of Plastic and Hand Surgery, Mumbai, Maharashtra, India ; Bai Jerbai Wadia Hospital for Children, Mumbai, Maharashtra, India.
Indian J Plast Surg. 2014 Sep-Dec;47(3):453-5. doi: 10.4103/0970-0358.146668.
A typical muscle variation of latissimus dorsi - the axillary arch is represented by the muscular or fibromuscular slip detached from the anteroinferior border of the musculus latissimus dorsi passing over the axilla under the axillary fascia crossing the medial side of the brachial plexus to continue as a septum intermusculare mediale brachii distally to the medial epicondyle of humerus. The full extent of the muscle is rarely present. Slips of muscle extend from the latissimus dorsi at the inferior angle of scapula to insert into pectoralis major (Langer), coracobrachilis, biceps or coracoid process forming what is described as a common variant - the muscular axillary arch. We report three cases of variants of latissimus dorsi, one of which has not been reported in the literature before.
背阔肌的一种典型肌肉变异——腋弓，表现为从背阔肌前下缘分离出的肌性或纤维肌性束带，它在腋筋膜下方越过腋窝，穿过臂丛神经内侧，向远端延续为肱内侧肌间隔，止于肱骨内上髁。该肌肉的完整形态很少出现。肌束带从肩胛下角处的背阔肌延伸，插入胸大肌（兰格）、喙肱肌、肱二头肌或喙突，形成一种常见变异——肌性腋弓。我们报告了3例背阔肌变异病例，其中1例此前未见文献报道。
