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Aortic aneurysm (AA) is a severe complication of Takayasu arteritis (TA). This study aimed to evaluate the prevalence, clinical and imaging features, management and long-term outcomes of AA in patients with TA.A retrospective study was performed of TA patients with AA admitted to Fuwai Hospital from 1996-2015. Baseline clinical data and follow-up data of TA patients with AA were collected and analyzed.Thirty-nine (4.2%) of 934 patients with TA were identified with AA that was related to vasculitis. The mean age at disease onset was 31 ± 10 years, with a female-to-male ratio of 1.79:1. The ascending aorta was the most common site of the aneurysmal lesion (18, 33.3%), and the most frequent manifestations associated with AA were chest tightness (12, 30.8%) and shortness of breath (12, 30.8%), which were usually concomitant with aortic valve insufficiency. Involvement of multiple sites in AA was found in 8 patients (20.5%), and multiple AAs were found in 5 patients (12.8%). No significant difference was observed in clinical and imaging findings between sexes. Of 25 patients (64.1%) with a median 72-month follow-up, 1 patient suffered from heart failure owing to perivalvular leakage, and 1 patient died, possibly related to severe complications of the operation.The prevalence of AA is relatively low in Chinese patients with TA. AA seems to develop more frequently in male patients with TA. Management should consider location and size of AA, complexity of vessel lesions and disease status. Long-term follow-up is indispensable.