Table 6.
Comparison of major complications between the difficult and control groups
| Group | Number of patients | Number of RFA | Complication (%) | Common complication name |
| Control | 88 | 121 | 1 (0.8)1 | Needle seeding (1/1) |
| Difficult | 382 | 568 | 28 (4.9)1 | |
| Near large vessels or bile ducts | 87 | 151 | 6 (4.0) | Bile duct injury (4/6) |
| Near peripheral structures | 232 | 309 | 18 (5.8) | GI perforation (3/18) Bloody pleural (3/18) Needle seeding (3/18) |
| Under liver capsule | 63 | 108 | 4 (3.7) | Hemoperitoneum (2/4) Needle seeding (2/4) |
| Total | 470 | 689 | 29 (4.2) |
1
The major complication rate in the difficult group was significantly higher than that in the control group (4.9% vs 0.8%, P = 0.041). RFA: Radiofrequency ablation.