| Pathological characteristics | D1 dissection | Modified D2 dissection | p value | |||
| No. | % age | No. | % age | |||
| Morphology of tumour | papillary adenocarcinoma | 15 | 65.2 | 18 | 66.7 | 0.163 (NS) |
| Tubular adenocarcinoma | 1 | 4.3 | 4 | 14.8 | ||
| Mucinous adenocarcinoma | 5 | 21.7 | 1 | 3.7 | ||
| Signet ring adenocarcinoma | 2 | 8.7 | 4 | 14.8 | ||
| Stage of disease | I | 2 | 8.7 | 5 | 18.5 | 0.531 (NS) |
| II | 10 | 43.5 | 13 | 48.1 | ||
| IIIA | 8 | 34.8 | 5 | 18.5 | ||
| IIIB | 3 | 13.0 | 4 | 14.8 | ||
| Surgical margins free (RO) | 23 | 100.0 | 27 | 100.0 | 1.000 (NS) | |
| Number of dissected lymph nodes (median) | 9 (3 - 23) | 23 (15 - 42) | <0.001 (Sig.) | |||
| N Staging | N0 | 7 | 30.4 | 6 | 22.2 | 0.173 (NS) |
| N1 | 10 | 43.5 | 7 | 25.9 | ||
| N2 | 6 | 26.1 | 14 | 51.9 | ||