Additional findings on brain MR imaging examinations in those patients with signal changes in the DVA drainage territory (signal) and those without (no signal)
| Other Imaging Findings | Signal | % | No Signal | % | P* |
|---|---|---|---|---|---|
| Abscess | 0 | 0.0 | 1 | 0.7 | NS |
| Aneurysm | 0 | 0.0 | 2 | 1.5 | NS |
| Atrophy | 0 | 0.0 | 1 | 0.7 | NS |
| Arteriovenous malformation | 0 | 0.0 | 1 | 0.7 | NS |
| CM | 0 | 0.0 | 3 | 2.2 | NS |
| Encephalomalacia | 0 | 0.0 | 3 | 2.2 | NS |
| Intracranial hemorrhage | 0 | 0.0 | 4 | 2.9 | NS |
| Infarct | 1 | 4.8 | 4 | 2.9 | NS |
| Lipoma | 0 | 0.0 | 1 | 0.7 | NS |
| Meningioma | 1 | 4.8 | 6 | 4.4 | NS |
| No other findings | 6 | 28.6 | 50 | 36.8 | NS |
| Postoperative changes | 2 | 9.5 | 12 | 8.8 | NS |
| Nonspecific white matter signal | 10 | 47.6 | 40 | 29.4 | NS |
| Parenchymal mass | 0 | 0.0 | 11 | 8.1 | NS |
| Sellar mass | 1 | 4.8 | 7 | 5.1 | NS |
| Tuberous sclerosis | 0 | 0.0 | 1 | 0.7 | NS |
Note:—NS indicates not significant; postoperative changes, expected findings after brain surgery for intracranial neoplasm; no other findings, no other abnormality identified on MR imaging; nonspecific white matter signal, scattered signal alterations in the white matter, not in a typical distribution for demyelinating disease.
* P values are from the Fisher exact test, NS with a P > .1.