Table 4. | Frequencies and relative frequencies of incidental findings identified in the anatomical regions of the nose, paranasal sinuses, temporomandibular joints and endocranium |
| Incidental finding | Frequency* |
Relative frequency* (%) |
|---|---|---|
| Nasal septum deviation | 611 | 82.5 |
| Conchae bullosa | 113 (45) | 15.3 (6.1) |
| Nasal mucosal thickening | 107 (94) | 14.5 (1.8) |
| Nasal polyp | 7 | 0.9 |
| Sinus mucosal thickening | 358 (180) | 48.3 (24.3) |
| Retention cyst | 58 (5) | 7.9 (0.7) |
| Sinus hypoplasia | 13 (6) | 1.7 (0.8) |
| Sinus aplasia | 1 | 0.1 |
| Sinus septa | 17 | 2.3 |
| Limited inflammatory changes | 37 (7) | 4.9 (0.9) |
| Moderate-severe inflammatory changes | 64 (27) | 8.6 (3.6) |
| Total opacification | 13 (2) | 1.8 (0.3) |
| Discontinuity of sinus floor - oroantral fistula | 9 (1) | 1.2 (0.1) |
| Foreign body/root in sinus | 1 | 0.1 |
| Sinus polyp | 15 (3) | 2 (0.4) |
| Ethmoid cell mucosal thickening | 12 | 1.6 |
| Ethmoid cell inflammatory changes | 79 | 10.9 |
| Sphenoid sinus mucosal thickening | 23 | 3.1 |
| Sphenoid sinus inflammatory changes | 12 | 1.6 |
| Frontal sinus mucosal thickening | 20 | 2.7 |
| Frontal sinus inflammatory changes | 8 | 1.4 |
| Frontal sinus hypoplasia | 39 | 5.2 |
| Frontal sinus aplasia | 9 | 1.2 |
| Paranasal benign entities | 4 | 0.5 |
| Soft tissue pathology on osseous borders | 1 | 0.1 |
| Sella turcica enlargement | 2 | 0.3 |
| Internal carotid artery calcification(s) | 11 (10) | 1.4 (1.3) |
*Values in brackets indicate frequency of bilateral localization. |
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