Table 1.
Baseline characteristics of the patients and colorectal lesions.
| Characteristics | |
|---|---|
| Age (year) | 61.4 ± 9.9 |
| Sex (%) | |
| Male | 452 (58.7%) |
| Female | 318 (41.3%) |
| Tumor location | |
| Right colon | 276 (35.5%) |
| Left colon | 150 (19.3%) |
| Rectum | 352 (45.2%) |
| Tumor morphology (%) | |
| LST-G-H | 77 (10.0%) |
| LST-G-NM | 296 (38.0%) |
| LST-NG-FE | 144 (18.5%) |
| LST-NG-PD | 109 (14.0%) |
| Is | 152 (19.5%) |
| Tumor size (mm) | 27.7 ± 14.1 |
| Histology (%) | |
| Adenoma (tubular or tubulovillous) | 436 (56.1%) |
| Sessile serrated lesion | 18 (2.3%) |
| Adenocarcinoma (mucosal cancer) | 239 (30.7%) |
| Adenocarcinoma (submucosal cancer) | 85 (10.9%) |
| Differentiation of adenocarcinoma (%) | |
| Well-differentiated | 265 (81.8%) |
| Moderately differentiated | 58 (17.9%) |
| Poorly differentiated | 1 (0.3%) |
LST-G-H, granular homogenous laterally spreading tumor; LST-G-NM, granular nodular mixed laterally spreading tumor; LST-NG-FE, non-granular flat elevated laterally spreading tumor; LST-NG-PD, non-granular pseudodepressed laterally spreading tumor.