pseudoaneurysm
Pronunciation: SOO-doh-AN-yoo-rizm
A contained rupture of an artery where blood leaks outside the vessel but remains contained by surrounding tissue.
Full Definition
A pseudoaneurysm, also called a false aneurysm, occurs when arterial wall disruption allows blood to leak into surrounding tissues while remaining contained by a fibrous capsule or hematoma. Unlike true aneurysms that involve all vessel wall layers, pseudoaneurysms represent contained arterial ruptures often caused by trauma, infection, or iatrogenic injury. These lesions can expand, compress adjacent structures, or rupture, requiring prompt recognition and treatment. The term appears frequently in imaging reports, emergency documentation, and procedural notes.
Usage
Usage note: Distinguish from true aneurysm by emphasizing the 'false' or contained rupture nature.
In Context
- "Ultrasound revealed a 3-cm pseudoaneurysm at the femoral puncture site." — Imaging report
- "The infected pseudoaneurysm required surgical repair and antibiotic therapy." — Operative note