Hard to Diagnose and Potentially Fatal: Slow Aortic Erosion Post Spinal Fusion

Abstract

BackgroundDelayed aortic injuries are a rare, but well-recognized complication of spinal surgery. They are a result of slow erosion of osteosynthesis material into the aorta. Although this is a life-threatening complication, patients might present years later with nonspecific symptoms. ObjectiveA complex case of slow aortic injury after thoracic spinal surgery is presented, which highlights the challenges involved in diagnosis and treatment. Case ReportA 62-year-old man had a T6 vertebrectomy and T5−7 anterior spinal fusion for multiple myeloma 5 years earlier. Two years postoperatively, the patient developed intermittent hemoptysis that triggered several presentations to the emergency department and consecutive hospital admissions during a 3-year period. All investigations, including endoscopy, bronchoscopy, and repeated chest computed tomography (CT) scans, were unremarkable. Eventually, the patient presented with frank hemoptysis associated with severe left-sided chest pain. Urgent CT angiography revealed a pseudoaneurysm measuring 34 × 20 mm at the level of the vertebrectomy. The patient underwent emergency surgery and an endoluminal stent graft was successfully placed. The patient remains well after 6 months. ConclusionsThe close proximity of the aorta and spine entertains the risk of aortic injury associated with vertebral osteosynthesis. Long-term complications of slow aortic erosion are extremely difficult to diagnose. The presented patient suffered from an undetected bronchio-aortic fistula with consecutive pseudoaneurysm formation and rupture. Awareness of slow aortic erosion is important for correct diagnostic pathways and subsequent early diagnosis to ensure a positive outcome for the patient.