| Pineal cyst |
910 (7.8) |
| Posterior fossa arachnoid cyst vs mega cisternal magna |
225 (1.9) |
| Developmental venous anomaly |
220 (1.9) |
| Nonspecific white matter lesions concerning for sequela of infection, inflammation, ischemia, dysmyelination, or demyelination |
188 (1.6) |
| Mastoid effusions |
141 (1.2) |
| Cavum septum pellucidum |
139 (1.2) |
| Arachnoid cyst |
128 (1.1) |
| Periventricular nodular heterotopia |
110 (0.9) |
| Tonsillar ectopia |
48 (0.4) |
| Choroidal fissure cysts |
41 (0.4) |
| Cavum vellum interpositum cysts |
34 (0.3) |
| Ventriculomegaly |
34 (0.3) |
| Possible glial neoplasm |
34 (0.3) |
| Parotid lymphoepithelial cysts |
27 (0.2) |
| Chiari I malformation |
23 (0.2) |
| Dilated central canal |
14 (0.1) |
| Hydrocephalus |
8 (0.07) |
| Focal cortical dysplasia |
7 (0.06) |
| Cavernous malformation |
6 (0.05) |
| Hypogenesis of the corpus callosum |
4 (0.03) |
| Encephalocele |
4 (0.03) |
| Syrinx |
3 (0.03) |
| Agenesis of the corpus callosum |
2 (0.02) |
| Polymicrogyria |
2 (0.02) |
