Kommerell diverticulum (KD) is an enlargement that occurs in proximal segment of aberrant right subclavian artey originating from descendent aorta. This dilatation consists in focal segment, therefore called as KD. Aberrant right subclavian artery has a normal diameter on later trace. Although left aberrant subclavian artery origins may show similar enlargement. This enlargement appears in origin of left aberrant subclavian artery from right sided aortic arcus and called aortic diverticulum. Aneurysm, trombosis in this dilated segment and dissection development with true and false lumens of aberrant subclavian artery after KD is very rare. This report presents coexistence of thrombosis and dissection with subclavian artery aneurism maintained from KD.
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