RESUMO
Anatomical variations are common in axilla. These are usually encountered during axillary explorations for breast cancer and other surgical procedures. The most common being the presence of a muscular slip known as the axillary arch. This muscle, usually arises from the latissimus dorsi to be attached to the pectoralis major (which is more common) or to the coracobrachialis or to the fascia over the biceps brachii. This may be single or present as multiple bands and may or may not be clinically apparent. The axillary arch may cause thoracic outlet syndrome like symptoms, may pose difficulty in axillary explorations for various surgical procedures, reconstruction techniques and axillary bypass operations. The current case report is to discuss the features of this variation, with an emphasis on its surgical implications.