[Bronchogenic cyst mimicking traumatic aortic aneurysm].

The authors report a case of a 56 year old woman who had a road traffic accident a few years previously. The diagnosis of false aneurysm of the aortic isthmus suspected on chest X-ray way confirmed by 3D scanner. Surgery revealed a diagnostic error : the lesion was a bronchogenic cyst. The authors conclude that angiography should be performed for lesions of the aortic isthmus even when the appearances on scanner are very suggestive.