A pseuoaneurysm, also known as a false aneurysm, is the result of trauma to all three layers of an artery resulting in a hematoma that contains the bleed. This hematoma must continue to communicate with the artery to be considered a pseudoaneurysm. A pseudoaneurysm differs from a true aneurysm in that a pseudoaneurysm does not contain any of the vessel wall Media:http://www.myelectronicmd.com/get_reference.php?Id=1164 Media:http://www.cvtcollege.org/Ac_Programs/dms_vascular/studentbrandie.html.