Table 4.
Rate of appendix NET after appendectomy - Series of 2700 or more patients
| Pawa et al. [15] | Abdelaal et al. [16] | Butte et al. [17] | Coşkun et al. [18] | Barut et al. [9] | Amr et al. [14] | |
|---|---|---|---|---|---|---|
| Appendectomy, n | 14850 | 13641 | 8903 | 6777 | 2778 | 2724 |
| NET, n (%) | 215 (1.45) | 32 (0.23) | 40 (0.45) | 11 (0.16) | 12 (0.43) | 17 (0.62) |
| Gender, n (%) | ||||||
| M | 85 (39.5) | 25 (78.1) | 15 (37.5) | 6 (54.5) | 4 (33.3) | 6 (35.3) |
| F | 130 (60.5) | 7 (21.9) | 25 (62.5) | 5 (45.5) | 8 (66.7) | 11 (64.7) |
| Mean/median age | ||||||
| 33.2 | 25.3 | 37 | 20.2 | 37.5 | 29.5 | |
| Tumor size, n, (%) | ||||||
| <1 cm | 95 (44.2) | 30 (93.7) | 28 (70)** | 9 (81.8) | 8 (66.7) | 11 (64.7)# |
| 1–2 cm | 69 (32.1) | 2 (6.3) | 6 (15)** | 2 (18.2) | 3 (25) | 4 (23.5)# |
| >2 cm | 51 (23.7) | - | 3 (7.5)** | - | 1 (8.3) | 1 (5.9)# |
| Mean, cm | 0.98 | 0.49 | NA | 0.73 | 0.7 | 0.5 |
| Localization, n (%) | ||||||
| Tip | NA | 30 (93.7) | 24 (60)ǂ | 10 (91) | 10 (83.3) | 11 (64.7) |
| Body | NA | 1 (3.1) | 5 (12.5)ǂ | - | 1 (8.33) | 2 (11.8) |
| Base | NA | 1 (3.1) | 2 (5)ǂ | 1 (9) | 1 (8.33) | 2 (11.8) |
| WA/MF | - | 2 (5) MF | - | 2 (11.8) WA | ||
| WHO grade, n (%) | ||||||
| G1 | 200 (93)* | 31 (96.8) | NA | NA | NA | NA |
| G2 | 9 (4.2)* | 1 (3.2) | NA | NA | NA | NA |
| G3 | 1 (0.5)* | - | NA | NA | NA | NA |
| Subsequent RH | 46 | 1 | 3 | 1 | 1 | 2 |
*
Available for 210 patients;
**
tumor size for 3 patients (7.5%) not recorded;
ǂ
tumor localization for 7 patients not recorded;
#
tumor size for 1 patient (5.9%) not available due to perforation. F: Female; M: Male; NA: Not available in paper; WA/MF: Whole appendix/multifocal; RH: Right hemicolectomy.