Which contrast-enhanced CT scan findings are characteristic of stroke?

Updated: Nov 30, 2018
  • Author: Andrew Danziger; Chief Editor: L Gill Naul, MD  more...
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Answer

Contrast enhancement following brain infarction is typically seen in about two thirds of cases, usually during the second or third week post ictus. Common patterns of enhancement include patchy, gyriform, ring-like, and homogeneous. Earlier contrast enhancement corresponds to infarcts with larger volume and mass effect and is secondary to disruption of the blood-brain barrier with increased vascular permeability and/or reperfusion from recanalization or collateral circulation. Early contrast enhancement portends an increased risk of hemorrhagic transformation.


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