“Isolated Innominate Artery Aneurysm: A Very Rare Finding”

We describe the clinical case of an elderly woman with an aneurysm of right innominate artery, treated conservatively. The aneurysms of supraortic trunks and internal carotid artery are very rare (0.4-4% of all types of aneurysms); even rarer is the presence of aneurysms of subclavian and innominate artery (0.003%). Etiology is multifactorial and atherosclerosis accounts for 60% of cases. The clinical presentation is variable and the most common sign is the presence of a pulsatile mass on one side of the neck. In critically symptomatic patients, when rupture or embolization occurs, emergency treatment is mandatory. The most appropriate treatment is still controversial when aneurysm is asymptomatic and diameter is >30 mm.