Carotid-Axillary Bypass and Debridement for a Mycotic Aneurysm of the Left Subclavian Artery.

Mycotic subclavian aneurysms are rare, and their presence typically mandates urgent repair due to the associated high risk of rupture and mortality. A multi-disciplinary team effort is of utmost importance in ensuring favorable results. In this case report, we present a 79-year-old male with a rapidly enlarging mycotic left subclavian artery aneurysm secondary to a retrosternal abscess and left sternoclavicular septic arthritis, who underwent aneurysmal exclusion, a left carotid-left axillary bypass and pectoralis muscle flap coverage with a good outcome.