Table 2.
Frequency and type of anomalies identified on readings by a clinical neuroradiologist
| Count | Reading | Excluded from automated analysis |
|---|---|---|
| 24 | Mega cisterna magna | |
| 15 | Subarachnoid cysts (primarily temporal and frontal) | 14 |
| 12 | Pineal cysts | |
| 11 | White matter anomalies and corpus cysts | 3 |
| 5 | Tonsilar ectopias | |
| 5 | Very prominent perivascular spaces | |
| 5 | Gray matter heterotopias | 3 |
| 4 | Pituitary masses (primarily cysts) | |
| 4 | Abnormally large or asymmetrical lateral ventricles | 1 |
| 4 | Cavum septum pellucidum | |
| 3 | Developmental venous anomalies (DVA) | 1 |
| 1 | Severe cranio-cervical junction stenosis (10 mm) | 1 |
| 1 | Right parietal cortical mass (3 cm)a | 1 |
| 1 | Bilateral tonsillar herniation with medullary distortion (Chiari 1 malformation)a | 1 |
Note: N = 95/833, yielding 11.4% incidence.
aAfter referral for clinical follow-up by collection site investigators, excluded from study.