Aneurysm of an Aberrant Right Subclavian Artery (Kommerell)- A Rare Phenomenon

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Krishna Kumar Katheraveloo
Lenny Suryani Safri
Jih Huei Tan
Henry Chor Lip Tan
Mohamad Azim Md Idris
Hanafiah Harunarashid


The aberrant right subclavian artery (ARSA) is a rare congenital variant of the aortic arch. When there is present of this aberrant anatomy, the brachiocephalic trunk is usually absent and the right subclavian artery arises as the fourth large arteries from the arch of the aorta. When the ARSA arises from a diverticulum of the distal aortic arch or descending aorta, it is termed as Kommerell aneurysm . Herein, we present a 51 years old man presented with neck pain due to cervical spondylosis. Pre-operative chest x-ray revealed a widened mediastinum. Further computed tomography (CT) of the thorax revealed Kommerell aneurysm of 2.5cm in diameter which does not resulted in any symptoms. We discussed the clinical implications and management of this rare entity in the report.

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