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Table 5: 
Large-aneurysm Roy score distribution for initial result and subsequent follow-up angiograms
Initial Roy GradeNo. Aneurysms with Initial Result (%)Class 1 on Follow-Up (%)Class 2 on Follow-Up (%)Class 3 on Follow-Up (%)Recurrence (%)
Class 1: complete occlusion18 (42.9)11 (61.1)1 (5.6)6 (33.3)7 (38.9)
Class 2: residual neck16 (38.1)8 (50.0)6 (37.5)2 (12.5)2 (12.5)
Class 3: residual aneurysm8 (19.0)3 (37.5)*0 (0)5 (62.5)3 (37.5)
Total42 (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.