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Table 1 The clinical and clinicopathologic characteristics of the patients who underwent endoscopically complete resection for rectal NETs

From: Clinical outcomes of endoscopic mucosal resection for rectal neuroendocrine tumor

Variables No.
Age, median (range), years 50.9 (26–79)
Gender, male 170 (61.4%)
Endoscopic appearance  
 Polyp 22 (7.9%)
 Submucosal tumor 255 (92.1%)
Distance from anal verge, median (range), cm 7.1 (1–16)
Treatment modalities  
 Conventional EMR 243 (87.7%)
 EMR-D 23 (8.3%)
 EMR-P 11 (4.0%)
En-bloc resection 274 (98.9%)
Tumor size, median (range), mm 4.96 (1–22)
Group according to tumor size (%)  
 < 10 mm 256 (92.4%)
 10–19 mm 20 (7.3%)
 ≥20 mm 1 (0.3%)
Histologically complete resection 206(74.4%)
 Negative lateral margin 240 (86.6%)
 Negative deep margin 211 (76.1%)
Lymphovascular invasion  
 Yes 14 (5.1%)
 No 237 (85.5%)
 Indeterminate 28 (9.4%)
Grade  
 Gr1 246 (88.8%)
 Gr2 3 (1.1%)
 Not described 30 (10.8%)
Mitotic count  
 <  2/10 202 (72.9%)
 ≥ 2/10 9 (3.2%)
 Not described 66 (23.8%)
Presence of synchronous rectal NETs 3 (1.1%)
Tumor depth  
 Limited to mucosa 5 (1.8%)
 Submucosa 264 (95.3%)
 Muscularis propra or deeper 0 (0%)
 Indeterminate 8 (2.9%)
Follow-up 183 (66.1%)
 Follow-up duration, median (range), months 32.1 (2.3–146.0)
  1. Values are presented as median (range) or as numbers (%)
  2. Abbreviations: EMR endoscopic mucosal resection, EMR-D EMR using a dual-channel endoscope, EMR-P endoscopic mucosal resection after precutting, Gr grade, NET neuroendocrine tumor