Table 1. Clinicopathological characteristics of patients included.
| Characteristic | n |
|---|---|
| Sex | |
| Male/Female (%) | 79/57 (58/42) |
| Median age (range) | 62 years (25–90) |
| Ki-67 | |
| ≤55% / >55% (range) | 50/86 (20–100) |
| Chromogranin A | |
| Positive | 108 |
| Negative | 28 |
| Synaptophysin | |
| Positive | 129 |
| Negative | 7 |
| Primary Tumor | |
| Oesophageal | 5 |
| Gastric | 11 |
| Pancreatic | 23 |
| Colonic | 35 |
| Rectal | 10 |
| CUP | 41 |
| Other GI | 11 |
| Type of sample specimen | |
| Surgical | 83 |
| Surgical biopsy | 16 |
| Biopsy | 37 |
| Histological differentiation | |
| Well differentiated | 10 |
| Poorly differentiated | 73 |
| Data not available | 53 |
| Response according to RECIST criteria | |
| Complete response | 5 |
| Partial response | 37 |
| Stable disease | 36 |
| Progressive disease | 38 |
| Missing data | 20 |
| Metastases at diagnosis | |
| Liver | 87 |
| Lymph node | 29 |
| Lung | 11 |
| Bone | 3 |
| Brain | 6 |
| Pathology | |
| Small cell | 44 |
| Large cell | 92 |
| PD-L1 Immunoreactivity | |
| Positive | 14 |
| Negative | 122 |