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Local recurrence-free survival rates of patients according to the status of the bile duct margin evaluated by permanent section diagnosis
| Duration (yr) | Negative | Borderline | Positive | |
| Total layer | ||||
| Number of cases | 36 | 20 | 18 | |
| 1 | 0.940 | 0.862 | 0.667 | |
| 3 | 0.710 | 0.790 | 0.356 | |
| 5 | 0.710 | ND | ND | |
| 1Epithelial layer | ||||
| Number of cases | 36 | 20 | 6 | |
| 1 | 0.940 | 0.862 | 0.333 | |
| 3 | 0.710 | 0.790 | 0.167 | |
| 5 | 0.710 | ND | ND |
Patients with borderline or positive subepithelial layer were excluded. ND: Not determined.
