Table 2.
Clinicopathological chracteristics of hindgut neuroendocrine tumor
| Age (years) | |
| Range | 37 to 81 |
| mean ± SD | 59.6 ± 12.0 |
| MVD (mm2) | |
| Range | 1.4 to 73.9 |
| mean ± SD | 17.3 ± 14.2 |
| Relationship to venous invasion | Significant positive correlation (Mann–Whitney U test) |
| LMVD (mm2) | |
| Range | 0 to 22.9 |
| mean ± SD | 6.5 ± 6.5 |
| Relationship to lymphatic invasion | Significant positive correlation (Mann–Whitney U test) |
| Gender (n, %) | |
| Male | 23, 54.8 % |
| Female | 19, 45.2 % |
| Pathological grade (n, %) | |
| NET G1 | 34, 81 % |
| NET G2 | 8, 19 % |
| Ki 67 labeling index (%) | |
| Range | 0.1 to 3.2 |
| mean ± SD | 1.1 ± 0.8 |
| Relationship to tumor diameter | No significant correlation (Pearson’s product–moment correlation coefficient, p = 0.136) |
| Venous invasion (n, %) | |
| Negative | 32, 76.2 % |
| Positive | 10, 23.8 % |
| Lymphatic invasion (n, %) | |
| Negative | 29, 69 % |
| Positive | 13, 31 % |
| Tumor diameter (μm) | |
| Range | 998.1 to 10046.0 |
| mean ± SD | 5058.0 ± 2410.3 |
| Relationship to MVD | Significant positive correlation (Pearson’s product–moment correlation coefficient, r = 0.612, p < 0.001) |
| Relationship to LMVD | No significant correlation (Pearson’s product–moment correlation coefficient, p = 0.744) |
| Pathological stage (n, %) | |
| pStage I | 40, 95.2 % (all of them are pT1 and n0) |
| pStage II | 0, 0 % |
| pStage IIIB | 1, 2,4 % (lymph node metasis positive) |
| Unknown | 1, 2.4 % (margin positive) |
Legend: In this table clinicopathological characteristics and some statistical analyses of 42 hindgut neuroendocrine tumors were summarized
MVD microvessel density, LMVD lymphatic microvessel density, SD standard deviation