Abstract

Arterial variations are quite common. Many studies had elaborated variations in branching pattern of subclavian artery. Present study illustrates a unique feature of scalenus anterior muscle having two heads of origin and a common trunk for internal thoracic artery (ITA) and thyrocervical trunk (TCT). This rare common trunk passes between two heads of right scalenus anterior. Such rare variation was not reported so far. The rarity of such variation signifies the necessity of the present study. On the left side all branches arose normally from subclavian artery except dorsal scapular artery which originates from second part itself instead of third part which is a quite common variation. The Internal thoracic artery is widely utilized as a great conduit for Myocardial Revascularization. This common truncal origin is of great surgical importance to Cardiothoracic Surgeons, Cardiovascular Surgeons and Interventional Therapy Radiologists.

Authors and Affiliations