A CASE REPORT OF BILATERAL SUBCLAVIUS POSTICUS MUSCLE

During routine dissection of an adult male cadaver, in the neck region an aberrant muscle subclavius posticus was found on both sides. The muscle had a tendinous attachment anteriorly on the 1 st costal cartilage along with the subclavius. Long thin belly of this aberrant muscle was superficial to brachial plexus and subclavian artery and was attached posteriorly on to the scapula. Clinical significance of this muscle has been recognized as a possible cause of thoracic outlet syndrome or it may mimic as a mass on radiological investigation in this region. Radiologists and breast surgeons should be aware of this anomaly in scapular region.