Table 3 Summary of index tumor in the studied patients
| Primary index | Frequency | Percent | |
|---|---|---|---|
| Lung | 3 | 14.3 | |
| Breast | 2 | 9.5 | |
| Colon | 2 | 9.5 | |
| Liver | 2 | 9.5 | |
| Lymphoma | 2 | 9.5 | |
| Ovarian | 2 | 9.5 | |
| Renal | 2 | 9.5 | |
| Esophagus | 1 | 4.8 | |
| Gastric | 1 | 4.8 | |
| Larynx | 1 | 4.8 | |
| Nasopharyngeal | 1 | 4.8 | |
| Tongue | 1 | 4.8 | |
| Uterus | 1 | 4.8 | |
| Total | 21 | 100.0 | |