Table 3.
Histopathological features of patients with appendix neuroendocrine tumor
| n (%) | |
|---|---|
| Tumor localization | |
| Tip | 21 (63.64) |
| Middle | 11 (33.33) |
| Base | 1 (3.03) |
| Tumor size (mean) (cm) | 0,92 (0,20-2) |
| Ki67 index | |
| <2% | 31 (93.94) |
| 3–20% | 2 (6.06) |
| >20% | - |
| Number of mitosis | |
| <2 | 30 (90.9) |
| 2–20 | 3 (9.1) |
| >20 | - |
| WHO* Grade | |
| G1 | 30 (90.9) |
| G2 | 3 (9.1) |
| G3 | - |
| Tumor infiltration | |
| Mucosal infiltration | 5 (15.15) |
| Submucosa infiltration | 3 (9.09) |
| Muscularis propria infiltration | 14 (42.42) |
| Subserosa infiltration | 3 (9.09) |
| Serosa infiltration | 7 (21.21) |
| Mesoapendix infiltration | 1 (3.03) |
| Stage According to the AJCC **guideline | |
| T1aN0M0 | 24 (72.73) |
| T1bN0M0 | 9 (27.27) |
| Vascular invasion | |
| Positive | 0 |
| Negative | 33 (100) |
| Surgical Margin | |
| Positive | 1 (3.03) |
| Negative | 32 (96.97) |
*
World Health Organization.
**
American Joint Committee on Cancer.