Table 2.
Treatment outcomes of conventional endoscopic mucosal resection and underwater endoscopic mucosal resection for duodenal neuroendocrine tumors.
| C-EMR (n = 7) | U-EMR (n = 8) | P-value | |
|---|---|---|---|
| Procedural time, min (IQR) | 15.8 (10.3–20.0) | 3.6 (2.2–5.8) | .013 |
| Lesion size, cm (IQR) | 0.7 (0.5–0.8) | 0.5 (0.4–0.8) | .232 |
| Specimen size, cm (IQR) | 1.1 (1.0–1.2) | 1.0 (0.7–1.3) | .613 |
| En bloc resection, n (%) | 7 (100) | 8 (100) | 1.000 |
| Endoscopically complete resection, n (%) | 7 (100) | 8 (100) | 1.000 |
| Pathologically complete resection, n (%) | 4 (57.1) | 5 (62.5) | 1.000 |
| Margin involvement or indeterminate, n (%) | 3 (42.9) | 3 (37.5) | .833 |
| Grade, n (%) | |||
| Grade 1 | 5 (71.4) | 8 (100) | .429 |
| Grade 2 | 1 (14.3) | 0 (0) | |
| Mitosis, n (%) | |||
| 0/10 HPF | 2 (28.6) | 7 (87.5) | .054 |
| 1/10 HPF | 5 (71.4) | 1 (12.5) | |
| Ki67, n (%) | |||
| 1% | 3 (42.9) | 6 (75.0) | .281 |
| 2% | 3 (42.9) | 2 (25.0) | |
| >2% | 1 (14.3) | 0 (0) | |
| Lymphovascular invasion, n (%) | 0 (0) | 0 (0) | − |
| Perineural invasion, n (%) | 0 (0) | 0 (0) | − |
| Perforation, n (%) | 1 (14.3) | 0 (0) | .467 |
| Bleeding, n (%) | 0 (0) | 0 (0) | − |
Abbreviations: C-EMR, conventional endoscopic mucosal resection; U-EMR, underwater endoscopic mucosal resection; IQR, interquartile range; HPF, high-power field; −, not available.