Table 2.
Extension of tumors from the clival region into the adjacent anatomical regions
| Zone of adjacent extension of the tumor | Number of cases | Percent |
|---|---|---|
| Cavernous sinus (unilateral extension) | 25 | 17.9 |
| Turkish saddle | 13 | 9.3 |
| Parasellar region (bilateral extension into the cavernous sinuses) | 12 | 8.6 |
| Suprasellar region | 20 | 14.3 |
| Apex of the temporal bone pyramid | 9 | 6.4 |
| Cerebellopontine angle | 8 | 5.7 |
| Sphenoidal sinus | 27 | 19.3 |
| Nasopharynx | 7 | 5.0 |
| Oropharynx | 3 | 2.1 |
| Posterior ethmoidal air cells | 4 | 2.9 |
| Orbit region | 2 | 1.4 |
| Inner opening of the auditory tube | 3 | 2.1 |
| Temporal lobe, subcortical structures | 4 | 2.9 |