Table 2 Imaging findings of ISSOs patients.

From: Isolated sphenoid sinus opacification is often asymptomatic and is not referred for otolaryngology consultation

Mucosal thickening

83 (37.2%)

Niveau formation

56 (25.1%)

Air bubbles

22 (9.8%)

Round lesion

23 (10.3%)

Expanding lesion

6 (2.6%)

Complete opacity

74 (33.2%)

Irregular shape

6 (2.7%)

Calcification in CT

16 (7.2%)

High density area in CT

4 (1.8%)

Flow void in T2-weighted MRI

25 (11.2%)

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