CT PNS revealed chronic sinusitis of bilateral maxillary and ethmoidal sinuses
, bilateral CSOM.
They are most likely to be seen in the frontal and ethmoidal sinuses
and less frequently--in the maxillary and sphenoidal sinuses.
There are four pairs of paranasal sinuses of forensic interest in the skull, namely, frontal, maxillary, sphenoidal and ethmoidal sinuses
(NAMBIAR et al., 1999).
Only the maxillary and ethmoidal sinuses
are present at birth.
Nasal Cavity and Paranasal Sinuses CT Scan showing the Bilateral Involvement of Nasal Cavities, Ethmoidal Sinuses
and Right Maxillary Sinus
highlighted the greater risk of optic neuropathy and poor visual outcome with sphenoid sinus, and fronto-ethmoidal mucoceles especially with the involvement of the posterior ethmoidal sinuses
Plain X-ray of the sinuses showed 72.5% of bilateral disease with involvement of maxillary and ethmoidal sinuses
. 16.7% of controls who had only headache without nasal symptoms had incidental mild haziness of maxillary sinuses on one side.
The normal mucociliary clearance in which the anterior group of sinuses like frontal, maxillary, and anterior ethmoidal sinuses
drain along the anterior and inferior part of pharyngeal end of Eustachian tube.
CT scan with contrast of the paranasal sinus showed a homogenous soft tissue density in the region of the middle meatus extending medially to the septum, superiorly to the skull base, posteriorly to ethmoidal sinuses
, laterally breeching the lamina papyraceae of the orbit, contrast enhancement was seen in this lesion (Figure 2).
There is compensatory thickening of skull vault with enlargement of left frontal and ethmoidal sinuses
, enlarged left mastoid air cells with elevation of petrous part of left temporal bone.
CT scan PNS showed pus in the left upper lid, pus in the left ethmoidal sinuses
and the left eyeball was pushed anterolaterally (Fig.
The pathophysiology of fronto-ethmoid mucoceles has been lightened in experimental studies and by clinical observations that the trapped mucosa in the frontal and ethmoidal sinuses
after obstruction of sinus ostia (8).