Table 2.
Pathological characteristics of primary proximal gastric cancer and remnant gastric cancer groups
|
Variables
|
PGC, n = 120 (%)
|
RGC, n = 41 (%)
|
P
value
|
| Tumor size, mean ± SD | 5.1 (3.4) | 5.3 (3.4) | 0.785 |
| Lauren type | 0.302 | ||
| Intestinal | 68 (56.7) | 27 (65.9) | |
| Diffuse/mixed | 52 (43.3) | 14 (34.1) | |
| Grade of histological differentiation | 0.256 | ||
| Well/moderately differentiated | 55 (45.8) | 23 (56.1) | |
| Poorly differentiated | 65 (54.2) | 18 (43.9) | |
| Lymphatic invasion | 0.484 | ||
| No | 51 (42.5) | 20 (48.8) | |
| Yes | 69 (57.5) | 21 (51.2) | |
| Venous invasion | 0.069 | ||
| No | 75 (62.5) | 32 (78) | |
| Yes | 45 (37.5) | 9 (22) | |
| Perineural invasion | 0.602 | ||
| No | 50 (41.7) | 19 (46.3) | |
| Yes | 70 (58.3) | 22 (53.7) | |
| pT | 0.842 | ||
| pT1/T2 | 46 (38.3) | 15 (36.6) | |
| pT3/T4 | 74 (61.7) | 26 (63.4) | |
| Number of resected LNs, mean ± SD | 43.2 (20.8) | 26 (14) | < 0.001 |
| LN metastasis | 0.204 | ||
| pN0 | 45 (37.5) | 20 (48.8) | |
| pN+ | 75 (62.5) | 21 (51.2) | |
| Lymph node ratio | 0.915 | ||
| LR0 | 76 (63.3) | 25 (61) | |
| LR1 | 21 (17.5) | 9 (22) | |
| LR2 | 11 (9.2) | 4 (9.8) | |
| LR3 | 12 (10) | 3 (7.3) | |
| pTNM | 0.773 | ||
| I | 36 (30) | 13 (31.7) | |
| II | 27 (22.5) | 11 (28.8) | |
| III | 57 (47.5) | 17 (41.5) | |
| Adjuvant chemotherapy | < 0.001 | ||
| No | 45 (37.5) | 29 (70.7) | |
| Yes | 71 (62.5) | 12 (29.3) | |
| Recurrence | 0.607 | ||
| No | 87 (72.5) | 28 (68.3) | |
| Yes | 33 (27.5) | 13 (31.7) | |
| Pattern of recurrence1 | 0.322 | ||
| Locoregional | 11 (33.3) | 5 (38.5) | |
| Distant | 12 (36.4) | 5 (38.5) | |
| Peritoneal | 14 (42.4) | 8 (61.5) | |
1
Patient can have more than one site of recurrence. P values in bold are statistically significant. PGC: Proximal gastric cancer; pTNM: Pathological tumor-node-metastasis; RGC: Remnant gastric cancer; LN: Lymph node; SD: Standard deviation.