The Morphological and Histological Study of Achselbogen Muscle—A Case Report

A muscular or fibromuscular slip that extends from the latissimus dorsi to the pectoralis major, pectoralis minor, coracobrachialis, or fascia across the biceps brachii characterizes the Achselbogen muscle, an anatomical variation of the axilla. Even though it is frequently asymptomatic, its existence is clinically significant during axilla-related surgical, radiological, and diagnostic procedures. The purpose of this case study is to highlight the significance of anatomical variations that are not only of interest to scholars but also crucial during axillary dissections to avoid complications and ensure the best possible surgical results. We observed an odd muscular slip that extended from the middle of the latissimus dorsi, passed laterally to the pectoralis muscle, and merged with the fascia covering the biceps brachii during normal dissection for Phase I MBBS students. Surgeons and radiologists need to be aware of Langer's arch to reduce accidental injury to neurovascular structures and prevent misinterpretation during imaging and surgical procedures in the axillary region. Safer, more effective clinical procedures can result from understanding these variations.

Keywords: Langer’s axillary arch, anatomical variation, Latissimus dorsi, axilla, clinical significance.