... For true aneurysms, the following etiologies have been reported: mycotic (8 cases, 36%), 1 , 6 , 9-11 , 14 , 15 atherosclerosis (6 cases, 27%), 4 , 5 , 8 , 12 , 17 idiopathic (5 cases, 23%), 2 , 5 , 7 , 13 , 20 Behcet's disease (2 cases, 9%), 16 , 18 and iatrogenic (1 case, 5%). 19 For false aneurysms, the following etiologies have been reported: mycotic (7 cases, 33%), 22 , 24 , 26 , 29 , 32 , 35 iatrogenic (6 cases, 29%), 27 , 30 , 36 blunt trauma (2 cases, 10%), 21 , 33 penetrating trauma (2 cases, 10%), 23 , 34 Behcet's disease (1 case, 5%), 25 idiopathic (1 case, 5%), 28 unspecified systemic vascular disease (1 case, 5%), 31 and vascular Ehlers-Danlos Syndrome (vEDS) (1 case, 5%). 37 Authors of many case reports included in this review have stated that the majority of false TPTAs are secondary to trauma, infection, or iatrogenic injury. ...