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Table 1: MR imaging characteristics of encephaloceles compared between patients with a history of seizure and those with no history of seizure^{^a}
Variable Total (n = 77) History of Seizure (n = 35) No History of Seizure (n = 42) P
Location of encephaloceles .91
 Left 22 (28.6) 10 (28.6) 12 (28.6) 
 Right 16 (20.8) 8 (22.9) 8 (19.1) 
 Bilateral 39 (50.7) 17 (48.6) 22 (52.4) 
Side of largest encephalocele .80
 Left 43 (55.8) 19 (54.3) 24 (57.1) 
 Right 34 (44.2) 16 (45.7) 18 (42.9) 
Total No. of encephaloceles .12
 1 26 (33.8) 15 (42.9) 11 (26.2) 
 >1 51 (66.2) 20 (57.1) 31 (73.8) 
Median No. of sextants^{^b} containing encephaloceles 3 (2) 2 (2) 3 (3) .21
 Largest encephalocele 
  Depth (mm) 5 (3) 5 (3) 5.5 (3) .88
  Areal extent (mm²) 117 (142) 119 (144) 117 (154) .93
  Volume (mm³) 368 (538) 374 (512) 364 (632) .76
Morphologic distortion of adjacent brain parenchyma .51
 Minimal 11 (14.3) 4 (11.4) 7 (16.7) 
 Mild 21 (27.3) 10 (28.6) 11 (26.2) 
 Moderate 32 (41.6) 17 (48.6) 15 (35.7) 
 Severe 13 (16.9) 4 (11.4) 9 (21.4) 
Longest single dimension of distorted parenchyma adjacent to largest encephalocele (mm) 13 (11) 14 (13) 13 (11) .54
Presence of adjacent encephalomalacia 9 (11.7) 2 (5.7) 7 (16.7) .14
↵a Data are median (interquartile range) or No. (%).
↵b Middle cranial fossa sextants.