Giant thoracic aorta aneurysm below an endovascular stent - An unexpected finding during linear endoscopic ultrasound.

A 50-year-old woman with a history of bicuspid aortic valve (BAV) and ascending aorta dissection was referred for endoscopic ultrasound (EUS) for suspected choledocholithiasis. Twelve years earlier she had undergone a Bentall-de Bone procedure and 7 years earlier a thoracic aorta aneurysm (TAA) was repaired with an endovascular prosthesis. EUS confirmed choledocholithiasis, however a large aneurysm (60 mm of diameter), was incidentally detected at the distal end of the aortic endoprosthesis. Computed tomography (CT) later confirmed the aneurysm, extending 4.5 cm above the renal arteries. The patient underwent a successful new endovascular repair. This rare incidental finding underscores the usefulness of a systematic approach when performing EUS, enabling the detection of significant abnormalities beyond the initial indication and allowing for early intervention in TTA patients.