Table 1.
Prevalence of anatomic variants of sphenoid sinus and related structures in 300 Libyan patients
| Bilateral | Right side | Left side | Total | |
|---|---|---|---|---|
| Pneumatization | ||||
| ACP | 19 (6.3%) | 17 (5.6%) | 10 (3.3%) | 46 (15.3%) |
| GWS | 26 (8.6%) | 15 (5%) | 19 (6.3%) | 60 (20%) |
| PP | 41 (13.6) | 20 (6.6) | 26 (8.6%) | 87 (29%) |
| Protrusion | ||||
| ICA | 68 (22.6%) | 34 (11.3%) | 21 (7%) | 123 (41%) |
| ON | 61 (20.3%) | 21 (7%) | 25 (8.3%) | 107 (35.6%) |
| MN | 25 (8.3%) | 26 (8.6%) | 22 (7.3%) | 73 (24.3%) |
| VN | 40 (13.3%) | 17 (5.6%) | 24 (8%) | 81 (27%) |
| Dehiscence | ||||
| ICA | 31 (10.3%) | 43 (14.3%) | 16 (5.3%) | 90 (30%) |
| ON | 30 (10%) | 37 (12.3%) | 25 (8.3%) | 92 (30.6%) |
| MN | 10 (3.3%) | 15 (5%) | 14 (4.6%) | 39 (13%) |
| VN | 46 (15.3%) | 31 (10.3%) | 34 (11.3%) | 111 (37%) |
ACP, anterior clinoid process; GWS, greater wing of sphenoid; PP, pterygoid process; ICA, internal carotid artery; ON, optic nerve; MN, maxillary nerve; VN, vidian nerve.