Table 3.
Pathology
| Pathology results | |||||
|---|---|---|---|---|---|
| Open (n = 49) | MI (n = 47) | p-value | |||
| Pathology type | |||||
| Intestinal type adenocarcinoma | 25 | 51.0% | 16 | 34.0% | 0.366* |
| Diffuse type adenocarcinoma | 19 | 38.8% | 26 | 55.3% | |
| Carcinoid | 1 | 2.0% | 1 | 2.1% | |
| Signet cell carcinoma | 3 | 6.1% | 1 | 2.1% | |
| Other | 1 | 2.0% | 3 | 6.4% | |
| ypT-stage | |||||
| T0 (complete regression) | 4 | 8.2% | 3 | 6.4% | |
| Tis | 2 | 4.1% | 1 | 2.1% | |
| T1 | 8 | 16.3% | 6 | 12.8% | |
| T2 | 4 | 8.2% | 5 | 10.6% | |
| T3 | 19 | 38.8% | 17 | 36.2% | |
| T4 | 12 | 24.5% | 15 | 31.9% | |
| ypN-stage | |||||
| N0 | 23 | 46.9% | 20 | 42.6% | |
| N1 | 13 | 26.5% | 7 | 14.9% | |
| N2 | 8 | 16.3% | 8 | 17.0% | |
| N3 | 5 | 10.2% | 12 | 25.5% | |
| Radical resection | |||||
| Proximal margin | 0 | 3 | 5% | 0.242 | |
| Distal margin | 1 | 2.2% | 0 | 0.495 | |
| Lymph nodes | |||||
| Total LN | 43.4 | ±17.3 | 41.7 | ± 16.1 | 0.612 |
| Micrometastasis | 3.2 | 4.4 | 0.514 | ||
| Macrometastasis | 1.4 | 2.1 | 0.332 | ||
| Station 1 | |||||
| Surgeon stated as resected | 49 | 100% | 47 | 100% | NA |
| LN in station (Y/N) | 44 | 89.8% | 45 | 95.7% | 0.549 |
| Average LN yield | 3 | (2–6) | 3 | (2–6) | 0.934 |
| Station 2 | |||||
| Surgeon stated as resected | 49 | 100% | 47 | 100% | NA |
| LN in station (Y/N) | 44 | 89.8% | 44 | 93.6% | 0.610 |
| Average LN yield | 2 | (1–4) | 2 | (1–3) | 0.181 |
| Station 3 | |||||
| Surgeon stated as resected | 49 | 100% | 47 | 100% | |
| LN in station (Y/N) | 45 | 91.8% | 47 | 100.0% | 0.387 |
| Average LN yield | 5 | (3–15) | 3 | (2–8) | 0.019 |
| Station 4 | |||||
| Surgeon stated as resected | 49 | 100% | 47 | 100% | NA |
| LN in station (Y/N) | 46 | 93.9% | 47 | 100.0% | 0.368 |
| Average LN yield | 6 | (2–11) | 5 | (2–12) | 0.770 |
| Station 5 | |||||
| Surgeon stated as resected | 48 | 98.0% | 45 | 95.7% | 0.613 |
| LN in station (Y/N) | 45 | 93.8% | 44 | 97.8% | 0.549 |
| Average LN yield | 1 | (0–3) | 1 | (0–3) | 0.381 |
| Station 6 | |||||
| Surgeon stated as resected | 49 | 100% | 47 | 100% | NA |
| LN in station (Y/N) | 45 | 91.8% | 46 | 97.9% | 0.513 |
| Average LN yield | 4 | (2–9) | 4 | (2–7) | 0.487 |
| Station 7 | |||||
| Surgeon stated as resected | 48 | 98.0% | 46 | 97.9% | 0.999 |
| LN in station (Y/N) | 44 | 91.7% | 44 | 95.7% | 0.610 |
| Average LN yield | 3.5 | (2–7) | 3.5 | (1–6.5) | 0.580 |
| Station 8 | |||||
| Surgeon stated as resected | 48 | 98.0% | 45 | 95.7% | 0.613 |
| LN in station (Y/N) | 46 | 95.8% | 42 | 93.3% | 0.147 |
| Average LN yield | |||||
| Station 9 | |||||
| Surgeon stated as resected | 49 | 100% | 44 | 93.6% | 0.113 |
| LN in station (Y/N) | 39 | 79.6% | 40 | 90.9% | 0.589 |
| Average LN yield | 2 | (1–4) | 4 | (1–6) | 0.125 |
| Station 10 | |||||
| Surgeon stated as resected | 27 | 57.4% | 23 | 48.9% | 0.683 |
| LN in station (Y/N) | 20 | 74.1% | 21 | 91.3% | 0.597 |
| Average LN yield | 1.5 | (0–4) | 1 | (0–4) | 0.989 |
| Station 11 | |||||
| Surgeon stated as resected | 42 | 89.4% | 36 | 76.6% | 0.302 |
| LN in station (Y/N) | 35 | 83.3% | 30 | 83.3% | 0.327 |
| Average LN yield | 2 | (0–3) | 1 | (0–3) | 0.796 |
| Station 12 | |||||
| Surgeon stated as resected | 39 | 83.0% | 35 | 74.5% | 0.631 |
| LN in station (Y/N) | 28 | 71.8% | 31 | 88.6% | 0.52 |
| Average LN yield | 1 | (0–2) | 2 | (0–4) | 0.096 |
| Station 13 | |||||
| Surgeon stated as resected | 1 | 2.1% | 0 | 0.999 | |
| LN in station (Y/N) | 0 | 0 | |||
| Average LN yield | – | – | |||
* Additional testing within groups with Bonferoni correction showed no differences between groups
** Additional testing within groups revealed there were significantly more N3 patients in the minimally invasive group