Prevalence of secondary lesions in the basal gangliaa relative to the total number of lesions identified by DSA and listed by etiology
| Study | AVM | Aneurysm | Other | No Lesion Identified | Secondary Lesion Identified |
|---|---|---|---|---|---|
| Halpin et al, 199431 | 4% (6) | 1% (2) | 7% (10) | 5% (8) | 12% |
| Zhu et al, 19978 | 2% (5) | 1% (2) | 1% (2) | 34% (70) | 4% |
| Yeung et al, 20097 | (0) | 4% (2) | (0) | 13% (7) | 4% |
Note:—Numbers in parentheses indicate the number of patients.
↵a Basal ganglia location is defined as any combination of caudate, globus pallidus, putamen, and thalamus.