Table 2.
Distribution, type, shape, laterality, and measurements of cranial-base anomalies
| (+) | (–) | |
|---|---|---|
| FNM | 130/500 (26.0) | 370/500 (74.0) |
| Dimension (mm) | ||
| Width | 4.47±1.61 (1.25-9.30) | |
| Length | 4.65±1.93 (1.36-9.12) | |
| Depth | 1.87±0.66 (0.73-4.09) | |
| SEF | 237/500 (47.4) | 263/500 (52.6) |
| Laterality | ||
| Unilateral | 70/237 (29.5) | |
| Bilateral | 167/237 (70.5) | |
| Type | ||
| Type 1 | 77/438 (17.6) | |
| Type 2 | 156/438 (35.6) | |
| Type 3 | 205/438 (46.8) | |
| Shape | ||
| Round | 307/438 (70.1) | |
| Oval | 109/438 (24.9) | |
| Irregular | 22/438 (5.0) | |
| Diameter (mm) | 1.07±0.50 (0.12-2.34) | |
| SEF-FO (mm) | 3.29±2.11 (0.36-21.39) | |
| SEF-FS (mm) | 12.44±2.85 (1.30-23.84) | |
| SEF-midline (mm) | 19.20±3.23 (3.09-29.87) | |
| CBM | 112/500 (22.4) | 388/500 (77.6) |
| Bifurcation | 4/112 (3.6) | |
| Inferior | 37/112 (33.0) | |
| Superior | 22/112 (19.6) | |
| Inferior recess | 38/112 (33.9) | |
| Superior recess | 5/112 (4.5) | |
| Channel | 6/112 (5.4) |
(FNM: fossa navicularis magna, SEF: sphenoid emissary foramen, FO: foramen ovale, FS: foramen spinosum, CBM: canalis basilaris medianus)
GValues are presented as number (%) or mean±standard deviation (range).