Baseline Demography and Disease Characteristics
| Patient no. | Age (y) | Sex | Primary tumor location | Tumor grade (Ki-67 value) | Hormonal status | Indication for imaging | Primary tumor resected |
| 1 | 74 | F | Ileum | G1 (<2%) | Functional | Restaging | Yes |
| 2 | 56 | F | Ileum | G1 (<2%) | Functional | Staging | Yes |
| 3 | 45 | F | Pancreas | G2 (5%) | Nonfunctional | Restaging | Yes |
| 4 | 41 | F | Ileum | G1 (1%) | Nonfunctional | Restaging | Yes |
| 5 | 56 | M | Pancreas | G1 (<2%) | Nonfunctional | Restaging | No |
| 6 | 39 | M | Pancreas | G2 (5%) | Nonfunctional | Restaging | Yes |
| 7 | 72 | M | Ileum | G2 (3%–5%) | Nonfunctional | Restaging | Yes |
| 8 | 67 | M | Unconfirmed (midgut) | G1 (<2%) | Functional | Restaging | Yes |
| 9 | 71 | F | Ileum | G2 (NA) | Functional | Restaging | Yes |
| 10 | 32 | M | Ileum | G2 (2%–5%) | Functional | Restaging | No |
| 11 | 63 | M | Ileum | G1 (1%) | Nonfunctional | Restaging | Yes |
| 12 | 42 | M | Pancreas | G1 (<2%) | Nonfunctional | Restaging | Yes |
G1 = low grade; G2 = intermediate grade; NA = not available.
Hormonal status was defined by either presence of clinical features typical of secretory syndrome (e.g., carcinoid syndrome) or by presence of hormones or their catabolites in serum or urine.