Table 2.
Categorization of portal veins of 178 patients based on different classifications
| BLB classification | Present cohort | Atri et al.(1) | Cheng et al.(6) | Covey et al.(2) |
|---|---|---|---|---|
| Type I | 112 (62.9) | Normal Type: 112 (62.9) | Type 1: 112 (62.9) | Type 1: 112 (62.9) |
| Type II | 37 (20.8) | 37 (20.8) | 35 (19.7) | 30 (16.9) |
| IIa | 23 (12.9) | Type 1a: 23 (12.9) | Type 2: 23 (12.9) | Type 2: 23 (12.9) |
| IIb | 7 (3.9) | Type 1b: 7 (3.9) | Type 3: 7 (3.9) | Type 3: 7 (3.9) |
| IIc | 5 (2.8) | Type 1c: 5 (2.8) | Type 4: 5 (2.8) | n.d. |
| IId | 2 (1.1) | Type 1d: 2 (1.1) | n.d. | n.d. |
| Type III | 1 (0.6) | Type 2: 1 (0.6) | n.d. | n.d. |
| Type IV | 28 (15.7) | n.d. | n.d. | 9 (5.1) |
| IVa | 1 (0.6) | n.d. | n.d. | n.d. |
| IVb | 1 (0.6) | n.d. | n.d. | n.d. |
| IVc | 3 (1.7) | n.d. | n.d. | n.d. |
| IVd | 6 (3.4) | n.d. | n.d. | Type 4: 6 (3.4) |
| IVe | 3 (1.7) | n.d. | n.d. | Type 5: 3 (1.7) |
| IVf | 6 (3.4) | n.d. | n.d. | n.d. |
| IVg | 8 (4.5) | n.d. | n.d. | n.d. |
| Matching ratio* | 178 of 178 (100) | 150 of 178 (84.3)† | 147 of 178 (82.6)† | 151 of 178 (84.8)† |
Values in parentheses are percentages. *Proportion of portal veins from 178 patients that could be depicted by each classification system. n.d., Portal vein configuration not defined in corresponding classification. †P < 0.001 versus matching ratio for BLB classification (χ2 test)