Table 1.
Baseline characteristics of the study population.
| Characteristics | Patients (n = 199) |
|---|---|
| Demographic | |
| Gender, male No. (%) | 105 (52.8%) |
| Gender, female No. (%) | 90 (47.2%) |
| Age, median (IQR), years | 55 (46–62) |
| Presence of symptoms | |
| Yes (%) | 66 (33.1%) |
| No (%) | 121 (60.8%) |
| Not available (%) | 12 (6.1%) |
| TNM staging | |
| Stage I-IIA (%) | 181 (91.0%) |
| Stage IIIB-IV (%) | 21 (9.0%) |
| Site | |
| High/medium rectum (%) | 111 (55.8%) |
| Low rectum (%) | 72 (36.2%) |
| Not available (%) | 16 (8.0%) |
| Resection | |
| Polypectomy (%) | 125 (62.8%) |
| EMR (%) | 22 (11.1%) |
| ESD (%) | 14 (7.0%) |
| TEMS (%) | 8 (4.0%) |
| LAR (%) | 12 (6.0%) |
| Not available (%) | 18 (9.1%) |
| Pathological features | |
| Size, median (IQR), mm | 6 (3.0–9.25) |
| Ulceration (%) | 18 (9.0%) |
| Depression (%) | 16 (8.0%) |
| Synchronous lesions (%) | 13 (6.5%) |
| Vascular invasion (%) | 16 (8.0%) |
| Perineural invasion (%) | 11 (5.5%) |
| Lymphatic invasion (%) | 11 (5.5%) |
| WHO 2010 Classification | |
| NET G1 (%) | 147 (73.9%) |
| NET G2 (%) | 41 (20.6%) |
| Not available (%) | 11 (5.5%) |
| Ki-67, median (%) | 1% (1–2%) |
| Nodal involvement | |
| Yes (%) | 18 (9.0%) |
| No (%) | 141 (70.9%) |
| Not available (%) | 40 (20.1%) |
EMR, endoscopic mucosal resection; ESD, endoscopic submucosal dissection; TEMS, transanal endoscopic microsurgery; LAR, low anterior resection.