Table 1.
Sites and overall frequencies of primary NETs in the USA (from the SEER Programme) and Norway (from the NRC)12–14
| Primary NET | Percentage of cases | ||
| SEER (n=17 321) | |||
| Black patients | White patients | NRC (n=2013) | |
| Lung | 18.3 | 31.9 | 21.0 |
| Stomach | 5.7 | 5.7 | 5.7 |
| Small intestine | 21.0 | 17.7 | 25.5 |
| Pancreas | 3.7 | 4.1 | 6.9 |
| Meckel | 0.1 | 0.4 | 0.5 |
| Appendix | 2.0 | 3.2 | 4.8 |
| Colon | 7.9 | 7.4 | 8.0 |
| Rectum | 27.0 | 12.3 | 7.2 |
| Breast | 0.4 | 0.4 | 1.6 |
| Prostate | 0.3 | 0.4 | 1.5 |
| Ovary | 1.2 | 1.6 | 2.4 |
NET, neuroendocrine tumour; NRC, Norwegian Registry of Cancer; SEER, Surveillance, Epidemiology and End Results.