TABLE 3.
Relative outcome analysis of patients with brainstem AVMs treated microsurgically
| Characteristic | No. of Patients (%) | ||
|---|---|---|---|
| Improved/Unchanged | Worse/Dead | Total | |
| Location | |||
| Midbrain | 4 (57) | 3 (43) | 7 |
| Pons | 10 (77) | 3 (23) | 13 |
| Medulla | 7 (78) | 2 (22) | 9 |
| Subtypes | |||
| Anterior midbrain | 1 (100) | 0 (0) | 1 |
| Posterior midbrain | 3 (50) | 3 (50) | 6 |
| Anterior pontine | 3 (50) | 3 (50) | 6 |
| Lateral pontine | 7 (100) | 0 (0) | 7 |
| Anterior medullary | 1 (100) | 0 (0) | 1 |
| Lateral medullary | 6 (75) | 2 (25) | 8 |
| Technique | |||
| Resection | 15 (83) | 3 (17) | 18 |
| Occlusion in situ | 6 (55) | 5 (45) | 11 |
| Presentation | |||
| Unruptured | 4 (66) | 2 (33) | 6 |
| Ruptured | 17 (74) | 6 (26) | 23 |