Table 2 Tumor criteria based on radiological findings Radiological tumor extension and classification Types of sphenoid sinus based on CT paranasal sinuses
Radiological tumor criteria | No. (%) |
|---|---|
Tumor diameter | 4–7.2 cm (mean ± SD 5.1 cm ± 0.5) |
Shape of tumors | |
Rounded | 8 (25.8%) |
Multilobar | 12 (38.7%) |
Dumbell | 11 (35.5%) |
Tumor extension | |
Modified Hardy classification | |
Grade III | 8 (25.8%) |
Grade IV | 19 (61.3%) |
Grade V | 4 (12.9%) |
Cavernous sinus invasion Knosp grading | |
Grade 1 | 2 (6.4%) |
Grade 2 | 7 (22.6%) |
Grade 3A | 6 (19.4%) |
Grade 3B | 3 (9.7%) |
Grade 4 | 13 (41.9%) |
Types of sphenoid sinus | |
Non pneumatized | 6 (19.4%) |
Conchal type | 3 (9.7%) |
Presellar type | 3 (9.7%) |
Pneumatized | 25 (80.6%) |