A<unk> , also known as a false aneurysm, is when there is locally contained hematoma outside an artery or heart due to damage to the vessel wall. The damage goes through all the three layers of the vessel, causing a leak, which is contained by a new weak wall formed by the products of the clotting cascade . Hence, a<unk>  does not contain any layer of the vessel wall. This differentiates it from a true aneurysm, which is formed by all the three layers of the vessel wall and dissecting aneurysm where there is breach in the innermost layer (tunica intima) and subsequent dissection/separation between tunica intima and tunica media.<unk>  being close to the vessel, it can be pulsatile, and can be mistaken for a true aneurysm or dissecting aneurysm. The most common presentation of<unk>  is Femoral<unk>  following access for endovascular procedure and it may complicate up to 8% of vascular interventional procedures. Small<unk> s can spontaneously clot, while others need definitive treatment. A<unk>  may also occur in a chamber of the heart following myocardial damage due to ischemia or trauma. A<unk>  of the left ventricle is a potentially lethal complication from a myocardial infarction.
Pseudoaneurysm
Duret haemorrhages
Cirsoid aneurysm
Angioma
Splinter hemorrhage
Charcot–Bouchard aneurysm
Dural ectasia
Dural arteriovenous fistula