| ERCP finding | Number (%) | Dramatic response to ERCP |
| Filling defects in CBD | 6 (50%) | 1 |
| Hydatid membrane protruded through ampulla | 3 (25%) | 2 |
| Cholangiographic communication with the cyst(s) | 3 (25%) | 3 |
| Total | 12 (100%) | P < 0.05 |