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Table 4: MR imaging findings
Characteristic Value
MR imaging scans (No. of patients) (%)^{^a} 
    T1-weighted^{^b} 
        Hyperintense lesions 21 (34.4)
        Hypointense lesions 31 (50.8)
        Hypointense center and hyperintense margin 
    T2-weighted^{^b} 
        Hyperintense lesions 6 (9.8)
        Hypointense lesions 36 (59.0)
        Heterogeneous lesions (hyperintense + hypointense) 19 (31.1)
T1, perfusion^{^c} 
    Slow and progressive ascending 3 (100)
T2, perfusion^{^c} 
    Decreased rCBV 3 (100)
Spectroscopy^{^c} 
    Decrease of NAA 2 (100)
    Increase of choline 2 (100)
    Increase of lipids 2 (100)
Diffusion-weighted (No. of patients) (%)^{^d} 
    Restricted diffusion 9 (47.3)
    Target sign 1 (5.2)
Note:—rCBV indicates relative CBV.
↵a Five patients did not have MR imaging scans and were eliminated from the calculations.
↵b The patient with the meningeal form was eliminated from the calculations.
↵c Only 3 patients underwent perfusion, and only 2 underwent spectroscopy.
↵d Five patients did not have diffusion and were eliminated from the calculations.