Absence of Pectoralis Major

During routine dissection in the Department of Anatomy, Andhra Medical College, we have found the absence of Pectoralis major on one side i.e., left side. The Pectoralis major and minor of right side are well developed. The clavicular fibres of left Pectoralis major are well developed. whereas the sternocostal fibres were absent. The Pectoralis minor on that side was thinned out. The relative literature of such an anatomical variant is discussed during the presentation.