MR imaging characteristics of encephaloceles compared between patients with a history of seizure and those with no history of seizurea
| 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 sextantsb 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 |