Prevalence of incidental findings
| Finding | n (%) | 95% CI |
|---|---|---|
| White matter hyperintensities* | 45 (7.83) | (5.9 to 10.3) |
| Vascular abnormalities | ||
| Lacunar infarcts | 17 (2.96) | (1.8 to 4.7) |
| Microhaemorrhages (n=9) | ||
| Single (cortical/deep) | 2 (0.35)/2 (0.35) | (0.10 to 1.24)/(0.10 to 1.24) |
| Various (cortical/deep) | 4 (0.70)/1 (0.17) | (0.28 to 1.77)/(0.04 to 0.96) |
| Structural vascular abnormalities (n=36) | ||
| Aneurysm | 1 (0.17) | (0.04 to 0.96) |
| Cavernous malformation (single/various) | 14 (2.43)/1 (0.17) | (1.466 to 4.04)/(0.04 to 0.96) |
| Malformation of venous development | 20 (3.48) | (2.27 to 5.31) |
| Cysts | ||
| Arachnoid (supratentorial/infratentorial) | 3 (0.52)/5 (0.87) | (0.19 to 1.51)/(0.38 to 2.01) |
| Pineal† | 2 (0.35) | (0.10 to 1.24) |
| Neuroepithelial | 1 (0.17) | (0.04 to 0.96) |
| Choroidal fissure cyst | 2 (0.35) | (0.10 to 1.24) |
| Posterior fossa cyst‡ | 4 (0.70) | (0.28 to 1.77) |
| Right hippocampus cyst | 1 (0.17) | (0.04 to 0.96) |
| Neoplasias | ||
| Meningioma | 10 (1.74) | (0.95 to 3.16) |
| Pituitary mass | 2 (0.35) | (0.10 to 1.24) |
| Small intraventricular mass§ | 1 (0.17) | (0.04 to 0.96) |
| Cerebellar hemispheric mass | 1 (0.17) | (0.04 to 1.96) |
| Other abnormalities | ||
| Brain volume loss¶ (n=40) | ||
| Frontal | 8 (1.39) | (0.71 to 2.71) |
| Temporal | 8 (1.39) | (0.71 to 2.71) |
| Parietal | 7 (1.22) | (0.60 to 2.48) |
| Cerebellum and brain stem | 4 (0.69) | (0.28 to 1.77) |
| Diffuse loss of brain volume | 13 (2.26) | (1.33 to 3.82) |
| Chiari malformation type I | 6 (1.04) | (0.49 to 2.25) |
| Syringomyelia | 1 (0.17) | (0.04 to 0.96) |
| Ventriculomegaly suspicious of NPH** | 2 (0.35) | (0.10 to 1.24) |
| Non-specific focus of altered signal†† | 4 (0.52) | (0.28 to 1.77) |
| Extracerebral findings (n=9) | ||
| Left frontal hyperostosis | 1 (0.17) | (0.04 to 0.96) |
| Signal alterations of clivus | 1 (0.17) | (0.04 to 0.96) |
| Other otorhinolaryngological processes‡‡ | 6 (1.04) | (0.49 to 2.25) |
| Right eye diameter increased | 1 (0.17) | (0.04 to 0.96) |
| Encephalomalacia after traumatic brain injury | 1 (0.17) | (0.04 to 0.96) |
*Fazekas scale score ≥2.
†>1 cm in diameter.
‡Arachnoid cyst versus mega cisterna magna.
§Possible subependymoma.
¶Enlargement of the subarachnoid spaces and sulcus (bigger than that expected by age).
**Normal pressure hydrocephalus.
††Excluding white matter hyperintensities related to small vessel disease.
‡‡Excluding mild inflammatory disease (mucosal thickening or small retention cysts).