Table 1.
Demographic and clinicopathological characteristics of the patients
| All | n (%) |
|---|---|
| Age (years) | |
| Mean (range) | 71.8 (38–91) |
| Sex | |
| Male | 351 (76.5) |
| Female | 108 (23.5) |
| Location | |
| Upper third | 103 (22.4) |
| Middle third | 157 (34.2) |
| Lower third | 199 (43.4) |
| Macroscopic type | |
| Elevated (I,IIa) | 146 (31.8) |
| Flat (IIb) | 4 (0.9) |
| Depressed (IIc, III) | 256 (55.8) |
| Complex (elevated + depressed) | 53 (11.5) |
| Tumor size (mm) | |
| Mean (range) | 21.9 (1–128) |
| Depth | |
| Mucosa | 330 (71.9) |
| Submucosa, < 500 μm | 59 (12.9) |
| Submucosa, ≥500 μm | 70 (15.2) |
| Histological type | |
| PD (pure differentiated) | 409 (89.1) |
| MD (mixed predominant differentiated) | 50 (10.9) |
| Lymphatic invasion | 35 (7.6) |
| Vascular invasion | 24 (5.2) |
| Ulceration | 66 (14.4) |
| First treatment | |
| ESD | 396 (84.5) |
| Gastrectomy | 63 (14.7) |
| Vertical margin + or x (for ESD) | 15 (3.8) |
| Horizonal margin + or x (for ESD) | 2 (0.5) |
| Non-curative resection (for ESD) | 61 (15.4) |
| Additional gastrectomy (for non-curative ESD) | 44 (72.1) |
| LNM | 11 (2.4) |
Abbreviations: PD pure differentiated-type, MD mixed differentiated-type, ESD endoscopic submucosal dissection, LNM lymph node metastasis