contrast extravasation
Pronunciation: eks-trav-uh-SAY-shun
Leakage of contrast material outside blood vessels into surrounding tissues during imaging procedures.
Full Definition
Contrast extravasation occurs when contrast material inadvertently leaks from blood vessels into surrounding soft tissues during CT or MRI examinations. This complication can result from vessel rupture, infiltration at the injection site, or vessel wall damage. In oncologic imaging, extravasation can cause local tissue damage, delay imaging procedures, and potentially interfere with accurate interpretation of tumor enhancement patterns. Radiologists must recognize extravasation patterns on images and distinguish them from pathologic enhancement. Prompt recognition is essential for appropriate patient management and prevention of tissue necrosis.
Usage
Usage note: Distinguish from normal vascular enhancement; requires immediate clinical attention.
In Context
- "Contrast extravasation was noted at the injection site with mild soft tissue swelling." — CT scan report
- "The apparent enhancement was determined to be contrast extravasation rather than tumor progression." — Radiology interpretation