Diffusion-weighted Imaging Reversibility In Stroke After Successful Mechanical Recanalization. Case report

Increased use of Diffusion-weighted imaging (DWI) in acute stroke has led to observations of early diffusion normalization in lesions thatinitially show diffusion slowing. The “renormalization” of DWI may be spontaneous or the result of thrombolytic therapy, thus, acuteslowing of diffusion is not necessarily an indicator of irreversible tissue damage. The perfusion-diffusion mismatch concept is attractiveas it assumes that DWI lesion size reflects the infarct core whilst the mismatch area reflects the penumbra. However, this concept maybe an oversimplification. This paper shows a case with Diffusion Lesion Reversal after successful neuroendovascular treatment andexcellent clinical outcome, and discuss the imaging characteristics associated with this phenomenon.