Unilateral sternal muscle in an adult melanodermic cadaver

The sternal muscle, also known as sternalis, rectussternal, parasternal or japonicus is a curious case of anatomical variation the anterior chest wall. During routine dissection, muscle mass related to sternum was found in wall right hemithorax melanodermic female cadaver. literature, its incidence mentioned vary from 3.1 23.5%, and little about function with divergences regarding origin, insertion, innervation vascularization. Clinically, some mastologists report that this finding often confused tumor, making it difficult distinguish between normal structures lesions symbolize cancer.