X-ray of normal frontal sinus. Note the lucency and scallope edges.
Mucosal thickening of left frontal sinus with air-fluid level in a patient with sinusitis.
Note: 5 year old child- frontal sinus not developed yet!
Incidental finding of hypoplastic frontal sinus in an adult.
Asymmetric and under-pneumatized frontal sinus.
Absent right frontal sinus (occipitomental view).
his occipitomental view of paranasal sinus X-ray shows an opacity with a meniscus sign involving the right maxillary sinus indicating presence of fluid usually mucopus in acute rhinosinusitis. Odontogenic sinusitis has to be ruled out in recurrent unilateral cases.
Right-sided maxillary sinus opacity with meniscus sign.
Air-fluid level (arrow) in a patient with acute maxillary sinusitis.
Bilateral maxillary sinus opacities with meniscus sign.
Significant bilateral air-fluid level of maxillary antrum. Copious mucopus drained during antral washout.
Traumatic fractures of left maxillary sinus with haemosinus air-fluid level (arrow) in OM view (above) and lateral view (below).
Complete opacity of left maxillary sinus.
Complete opacity of right maxillary sinus.
Opaque or hazy sinus may imply presence of fluid, diffuse mucosal thickening, polyposis, or maxillary malignancy. Bony erosion or sclerosis give clues to more serious aetiology.
CB - concha bullosa of middle turbinate, M - maxillary sinus
The corresponding CT-scan slice confirming the concha bullosa existence.