Aneurysm, False

**Definition:** Not an aneurysm but a well-defined collection of blood and CONNECTIVE TISSUE outside the wall of a blood vessel or the heart. It is the containment of a ruptured blood vessel or heart, such as sealing a rupture of the left ventricle. False aneurysm is formed by organized THROMBUS and HEMATOMA in surrounding tissue.

**Tree numbers:** - C14.907.065

**Synonyms:** - Pseudoaneurysm - False Aneurysm