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Subacute Infarction

Last Updated: October 1, 2018

Figure 1: Masslike, cortical FLAIR hyperintense signal (top row left) with heterogeneous enhancement (top row right) in the anterior left temporal lobe and right occipital lobe. No evidence of reduced diffusivity on DWI (bottom row left). This presentation is often challenging and requires an appropriate history to make the correct diagnosis as a subacute infarction can commonly be mistaken for a neoplasm. The faint T1 hyperintensity in the cortex (bottom row right) can be a clue to cortical laminar necrosis of subacute infarct.

Description

  • Interrupted flow to brain resulting in cerebral ischemia or infarction with variable neurologic deficits

Pathology

  • Critical disturbance in cerebral blood flow (CBF)
    • Severely ischemic core
      • CBF < (6-8 mL)/(100 g/min)
    • Oxygen depletio...