Kutlu, RamazanBaysal, TamerSığırcı, AhmetEge, ErdalSaraç, Kaya2017-06-242017-06-242003Kutlu, R. Baysal, T. Sığırcı, A. Ege, E. Saraç, K. (2003). Right Subclavian Artery Aneurysm Yin Yang Sign on CT. Cardiovasc Intervent Radiol, (26), 184–185.http://www.springerlink.com/content/y49913vmpn46d9en/https://hdl.handle.net/11616/7173True subclavian artery aneurysm (SAA) is a rare type of peripheral artery aneurysm. Thoracic outlet syndrome and atherosclerosis are the most common etiological factors [1]. Halsted [2] explained the poststenotic dilatation and the aneurysm development to be a result of turbulent flow near the narrowing and low blood pressure distal to the stenosis. The famous concept of “yin-yang” which represents a balance and equilibrium between good and evil is a classical Doppler sign of pseudoaneurysms. Mural thrombus in the SAA may also cause this appearance on contrast-enhanced CT (CECT) examination. In this report a case of true SAA due to a cervical rib and yin-yang appearance on CECT is presented.eninfo:eu-repo/semantics/openAccessArticle26184185