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Table 2: CT findings
Characteristic Value
Patterns (No. of patients) (%) 
    Pseudotumoral 21 (87.5)
    Meningeal 1 (4.1)
    Pseudotumoral + meningeal (combined) 2 (8.3)
    Calcifications (No. of patients) (%) 0 (0)
    Perilesional edema (No. of patients) (%)^{^a} 19 (90.4)
    Hydrocephalus (No. of patients) (%) 6 (25.0)
    Hemorrhage (No. of patients) (%)^{^b} 3 (13.0)
No. of lesions^{^b} 
    Mean (range) 3.0 (1–11)
Subgroup (No. of patients) (%) 
    Single lesions 9 (39.1)
    2–5 11 (47.8)
    6–10 2 (8.6)
    >10 1 (4.3)
Lesion size (No. of patients) (%)^{^b} 
    >2 cm 15 (65.2)
Larger axial diameter of the major lesion^{^b} 
    Mean (range) (cm) 2.6 (0.3–5.6)
CT attenuation (No. of patients) (%)^{^c} 
    Hyperattenuating lesions 11 (20.7)
    Hypoattenuating lesions 30 (56.6)
    Hypoattenuating center and hyperattenuating    margin 12 (22.6)
CT or MR imaging contrast enhancement (No. of    patients) (%) 
    Ring enhancement 17 (70.8)
    Nodular enhancement 3 (12.5)
    Ring and nodular enhancement 3 (12.5)
    Leptomeningeal enhancement 1 (4.1)
↵a This category considered only in the 21 patients with pseudotumoral form.
↵b These categories excluded the patient with the meningeal form isolated.
↵c Seven patients did not have CT scans and were eliminated from the calculations.