An axillary arch muscle – a case report

Introduction A number of accessory muscle slip cases in the axilla arising from latissimus dorsi, pectoralis major, ribs and costal cartilages have been reported by different authors [1]. These accessory muscle slips in the axilla have been described under variety of names (e.g., chondro-epitrochlearis, dorsoepitrochlearis, etc). These variant bundles are commonly referred to as “axillary arch” muscle, regardless of their site of origin [2]. In the present case, an axillary arch muscle was found which was arising from the latissimus dorsi and was inserting into the coracobrachialis muscle. The incidence of axillary arch muscle reported in different population groups as 7% in Japanese, 10% in Belgian, 0.25% in British Population [3] . Axillary arch muscles are common in apes. Presence of an axillary arch muscle in humans has an immense clinical and morphological importance.