China Aortic Infection and Graft Infection Study: An Ambispective Cohort

Inclusion Criteria: 1. Adults aged 18 years or older. 2. Patients with suspected or confirmed vascular infection involving the native arterial wall, vascular graft, or endograft, including but not limited to infectious aortitis, infected arterial aneurysm, vascular graft or endograft infection, and fistula-associated vascular infection. 3. Patients evaluated or treated at Zhongshan Hospital, Fudan University, with sufficient clinical information to allow diagnostic adjudication and outcome assessment. 4. For the prospective cohort, willingness to participate and provide informed consent when required. 5. For the retrospective cohort, availability of relevant clinical records meeting the requirements approved by the institutional ethics committee. Exclusion Criteria: 1. Isolated superficial surgical-site infection without evidence of involvement of the arterial wall, vascular graft, or endograft. 2. Insufficient clinical data to permit diagnostic adjudication or longitudinal outcome assessment. 3. Refusal to participate in the prospective component when informed consent is required.