A 61-year-old man with hypertension and psoriasis, which was treated with adalimumab, was admitted after a 1-month history of fever following a dental implantation. Computed tomography of the chest revealed a pseudoaneurysm in the aortic arch, and blood culture grew Salmonella enterica A diagnosis of mycotic pseudoaneurysm of the aortic arch due to Salmonella was made, and he was treated with cefoperazone-sulbactam. During his hospital stay, he developed hoarseness followed by haemoptysis, and underwent thoracic endovascular aortic repair followed by emergency open surgical repair. However, he died 5 weeks after the surgery due to acute upper gastrointestinal bleeding, which was confirmed as an aortoesophageal fistula by oesophagogastroscopy.© Royal College of Physicians 2022. All rights reserved.