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Sample case of intravascular CNS lymphoma involving PVSs, seen on axial T1 (A), axial and coronal T1 postcontrast (B, C), and axial T2/FLAIR images (D, E). There is linear, predominantly perivascular enhancement extending from the right thalamus and basal ganglia into the corona radiata, frontal, parietal, and temporal lobes with associated T2/FLAIR signal abnormality.
