Table 1 The background of ISSOs patients.

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

Cases

223

Age

Median

69

Range

6–93

Sex

Male

128

Female

95

Modality

CT alone

74

MRI alone

101

CT and MRI

48

Brain MRI

139

Head CT

81

Sinus CT

24

Sinus MRI

4

Other CTs

17

Other MRIs

6

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