Table 4.
Comparison of lymph node metastasis between EPNI positive and negative patients after operation.
| Overall | EPNI (-) | EPNI (+) | P | |
|---|---|---|---|---|
| 96 | 40 | 56 | ||
| Positive LN (%) | ||||
| <=3 | 60 (62.5) | 28 (70.0) | 32 (57.1) | 0.285 |
| >3 | 36 (37.5) | 12 (30.0) | 24 (42.9) | |
| LN dissection (%) | ||||
| <=24 | 54 (56.2) | 26 (65.0) | 28 (50.0) | 0.211 |
| >24 | 42 (43.8) | 14 (35.0) | 28 (50.0) | |
| Type (%) | ||||
| I | 32 (33.3) | 11 (27.5) | 21 (37.5) | 0.545 |
| II | 38 (39.6) | 18 (45.0) | 20 (35.7) | |
| III | 26 (27.1) | 11 (27.5) | 15 (26.8) | |
| PLX1 (%) | 28 (56.0) | 2 (14.3) | 26 (72.2) | 0.001 |
| PLX2 (%) | 30 (54.5) | 4 (20.0) | 26 (74.3) | <0.001 |
| EPNI (%) | 47 (49.0) | 6 (15.0) | 41 (73.2) | <0.001 |
| No. 14.ab (%) | 17 (17.7) | 4 (10.0) | 13 (23.2) | 0.161 |
| No. 14.cd (%) | 11 (17.2) | 1 (3.4) | 10 (28.6) | 0.020 |
| No. 9 (%) | 16 (27.6) | 2 (9.1) | 14 (38.9) | 0.031 |
| No. 8a (%) | 39 (40.6) | 15 (37.5) | 24 (42.9) | 0.752 |
| No.8p (%) | 22 (22.9) | 9 (22.5) | 13 (23.2) | >0.999 |
| No.7 (%) | 7 (7.3) | 3 (7.5) | 4 (7.1) | >0.999 |
| No. 5 (%) | 9 (9.4) | 4 (10.0) | 5 (8.9) | >0.999 |
| No. 6 (%) | 6 (6.2) | 4 (10.0) | 2 (3.6) | 0.392 |
| No.13 (%) | 46 (47.9) | 19 (47.5) | 27 (48.2) | >0.999 |
| No.17 (%) | 38 (39.6) | 16 (40.0) | 22 (39.3) | >0.999 |
EPNI, extrapancreatic perineural invasion; LN, lymph node; PLX1, extrapancreatic perineural invasion 1; PLX2, extrapancreatic perineural invasion 2.