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| Total, No. | AS, No. | ITBL, No. | Leakage, No. | |
|---|---|---|---|---|
| ERC/PTC | 42 | 33 | 18 | 3 |
| Correct pos. on US | 8/17 | 11/18 | 2/3 | |
| Correct neg. on US | 9/9 | 24/35 | 38 | |
| False pos. on US | 0 | 0 | 1/2 | |
| False neg. on US | 25/33 | 7/18 | 1/2 |
Abbreviations: AS: Anastomotic Stenosis, ITBL: Ischemic Type Biliary Lesion; ERC/PTC, endoscopic retrograde cholangio/percutaneous transhepatic cholangio- drainage.
