31 Winter & Spring 2021, Volume 18, Number 1 Case Report: The Anomalous Insertion of Pectoralis Minor (Le Double Type III): A Case Report Adil Asghar 1* , Ravi Kant Narayan 1 , Abhigyan Satyam 1 , Padamjeet Panchal 1 ,Shagufta Naaz 2 1. Department of Anatomy, All India Insitute of Medical Sciences Patna (AIIMS Patna), Patna, India. 2. Department of Anaeshesiology, All India Insitute of Medical Sciences Patna (AIIMS Patna), Patna, India. * Corresponding Author: Adil Asghar, PhD. Address: Department of Anatomy, All India Insitute of Medical Sciences Patna (AIIMS Patna), Patna, India. Tel: +91 (991) 1225915 E-mail: dradilasghar2009@gmail.com A B S T R A C T Keywords: Ectopic, Anomalous, Pectoralis minor, Prevalence, Rotator cuf Introduction: The pectoralis minor muscle originates from the third to ffth ribs of the ches wall and inserts at the medial side of the coracoid process of the scapula. It contributes to the abduction of the scapulothoracic joint and the downward movement of the shoulder. The anomalous insertion of pectoralis minor beyond the coracoid process is recognized since the 19th century. This sudy aimed to report the curious case of the anomalous insertion of pectoralis minor at greater tuberosity via rotator interval. Case Report: A unilateral anomalous insertion of pectoralis minor muscle was found on the right side during the routine dissection of the upper limb in a sixty-year-old male cadaver. The anomalous attachment was present beyond the coracoid process which extended to the underneath of the coracoacromial ligament. After cutting the coracoacromial ligament, the tendon was located in the rotator interval, i.e., followed by its fnal insertion at greater tuberosity along with the tendon of the supraspinatus muscle. Three variations of anomalous tendon insertion were identifed based on the classifcation of Le Double. In this case, type IIIM of Le Double classifcation was found; muscle belly (not tendon) crossed the coracoid process and attached at greater tuberosity. The muscle was separated from the coracoid process by a very thin bursa. Conclusion: The pectoralis minor tendon may be found in the rotator interval, and surgeons should be careful during rotator cuf repairs. Article info: Received: 25 Aug 2020 Accepted: 30 Nov 2020 Available Online: 01 Jan 2021 Citation Asghar A, Narayan RK, Satyam A, Panchal P, Naaz S. The Anomalous Insertion of Pectoralis Minor (Le Double Type III): A Case Report. Anatomical Sciences. 2021; 18(1):31-36. Use your device to scan and read the artcle online