Case Report
Year: 2014 | Month: February | Volume: 4 | Issue: 2 | Pages: 198-201
Accessory Pectoralis Muscle Intervening Between Pectoralis Major and Minor Muscles - A Case Report/h2>
Jyothsna Patil, Naveen Kumar, Swamy Ravindra S, Somayaji SN, Satheesha Nayak B, Mohandas Rao KG
Melaka Manipal Medical College (Manipal Campus), Manipal University, Manipal. India
Corresponding Author: Naveen Kumar
ABSTRACT
Pectoral region is known to show the presence of accessory muscles. Functionally these muscles are regarded as insignificant, but their presence sometime causes confusions in the interpretation of radiologic procedures. One such anomalous accessory pectoralis muscle we would like to report here. This muscle was found between pectoralis major and minor muscles of left pectoral region, separated from them by a thin layer of fascia. It originated from the outer surface of left 4th rib and upper aspect of its costochondral junction. It fused with the deeper fibers of pectoralis major muscle near its insertion. Existence of such accessory muscles is rarely noted during diagnostic imaging techniques, prior knowledge of its occurrence is important for surgeons to achieve suitable dissection planes during surgery of the chest wall.
Key words: Accessory pectoralis, sternalis, pectoralis quartus, pectoralis intermedius