Table 1 Incidence of Invasion of Each Site in 469 Patients with Skull-base Invasions according to MRI
Site of skull-base invasion | Bilateral | Left | Right | Total (%) |
|---|---|---|---|---|
Base of sphenoid | 439 (93.6) | 439 (93.6) | ||
Foramen lacerum | 116 (24.7) | 117 (24.9) | 95 (20.3) | 328 (69.9) |
Clivus | 239 (51.0) | 239 (51.0) | ||
Petrous apex | 58 (12.4) | 93 (19.8) | 85 (18.1) | 236 (50.3) |
Medial pterygoid plate | 11 (2.3) | 107 (22.8) | 84 (17.9) | 202 (43.1) |
Foramen ovale | 20 (4.3) | 92 (19.6) | 90 (19.2) | 202 (43.1) |
Pterygopalatin fossa | 12 (2.6) | 69 (14.7) | 57 (12.2) | 138 (29.4) |
Foramen rotundum | 14 (3.0) | 47 (10.0) | 52 (11.1) | 113 (24.1) |
Foramen magnum | 93 (19.8) | 93 (19.8) | ||
Hypoglossal canal | 14 (3.0) | 34 (7.2) | 41 (8.7) | 89 (29.0) |
Lateral pterygoid plate | 2 (0.4) | 36 (7.7) | 37 (7.9) | 75 (16.0) |
Jugular foramen | 2 (0.4) | 22 (4.7) | 29 (6.2) | 53 (11.3) |