Large-aneurysm Roy score distribution for initial result and subsequent follow-up angiograms
| Initial Roy Grade | No. Aneurysms with Initial Result (%) | Class 1 on Follow-Up (%) | Class 2 on Follow-Up (%) | Class 3 on Follow-Up (%) | Recurrence (%) |
|---|---|---|---|---|---|
| Class 1: complete occlusion | 18 (42.9) | 11 (61.1) | 1 (5.6) | 6 (33.3) | 7 (38.9) |
| Class 2: residual neck | 16 (38.1) | 8 (50.0) | 6 (37.5) | 2 (12.5) | 2 (12.5) |
| Class 3: residual aneurysm | 8 (19.0) | 3 (37.5)* | 0 (0) | 5 (62.5) | 3 (37.5) |
| Total | 42 (100) | 22 (52.4) | 7 (16.7) | 13 (31.0) | 12 (28.6) |
* One of these 3 patients had parent-vessel occlusion on follow-up angiography, which was graded as Roy class 1.