Table 1b. Tumor characteristics based on surgical pathology findings.
| R0 resection N=105 (%) | R1 resection N=49 (%) | Total N=154 (%) | |
|---|---|---|---|
| Tumor size (mm) | |||
| Mean±s.d. | 32.0±13.6 | 36.1±13.2 | 33.6±13.8 |
| Median | 30 | 33 | 31 |
| Range | 8–80 | 17–70 | 8–80 |
| Tumor location | |||
| Head/uncinate | 89 (57.8) | 41 (26.6) | 130 (84.4) |
| Body | 10 (6.5) | 4 (2.6) | 14 (9.1) |
| Tail | 6 (3.9) | 4 (2.6) | 10 (6.5) |
| Surgery | |||
| Whipple | 88 (57.1) | 40 (26.0) | 128 (83.1) |
| Distal pancreatectomy | 16 (10.4) | 9 (5.8) | 25 (16.2) |
| Total pancreatectomy | 1 (0.6) | — | 1 (0.6) |
| Cytological differentiation | |||
| Well differentiated | 22 (14.3) | 5 (3.2) | 27 (17.5) |
| Moderately differentiated | 57 (37.0) | 32 (20.8) | 89 (57.8) |
| Poorly differentiated | 26 (16.9) | 12 (7.8) | 38 (24.7) |
| Regional lymph node involvement | |||
| None | 32 (20.7) | 19 (12.3) | 51 (33.1) |
| 1 | 21 (13.6) | 4 (2.5) | 25 (16.2) |
| 2 | 15 (9.7) | 11 (7.1) | 26 (16.8) |
| >2 | 37 (24.0) | 15 (9.7) | 52 (33.8) |
| Perineural invasion | 84 (54.5) | 47 (30.5) | 131 (85.1) |
| Tumor stage | |||
| IA | 5 (3.2) | — | 5 (3.2) |
| IB | 8 (5.2) | 6 (3.9) | 14 (9.1) |
| IIA | 19 (12.3) | 8 (5.2) | 27 (17.5) |
| IIB | 71 (46.1) | 28 (18.2) | 99 (64.3) |
| III | 2 (1.3) | 7 (4.5) | 9 (5.8) |