Table 1 Distribution of the studied cases (n = 30) according to primary malignancy and clinical manifestations
| Â | Patients no. (n = 30) | % |
|---|---|---|
Primary | ||
 Unknown | 18 | 60.0 |
  Primary identified by PET-CT |  |  |
   Bronchogenic | 10 | 33.3 |
   Renal cell carcinoma | 2 | 6.7 |
   Lymphoma | 2 | 6.7 |
  Unidentified | 4 | 13.3 |
 Known | 12 | 40.0 |
  Bronchogenic | 5 | 16.7 |
  Breast cancer | 3 | 10.0 |
  Melanoma | 2 | 6.7 |
  Renal cell carcinoma | 1 | 3.3 |
  Papillary thyroid carcinoma | 1 | 3.3 |
Neurological symptoms | ||
 Free | 14 | 46.7 |
 Headache | 12 | 40.0 |
 Hemi paresis | 2 | 6.7 |
 Disturbed level of consciousness | 2 | 6.7 |
Systemic metastases | ||
 Bony | 12 | 40.0 |
 Nodal | 10 | 33.3 |
 Lung | 8 | 26.7 |
 Suprarenal | 4 | 13.3 |
 Hepato-splenic | 2 | 6.7 |
 Subcutaneous | 2 | 6.7 |
 None | 14 | 46.7 |