Endoscopic view of an asymmetric roof of the ethmoid sinus

April 30, 2012
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Rhinoscopic Clinic

It is important to study the anatomy of the roof of the ethmoid sinus both preoperatively and intraopereatively, especially to determine whether there are differences in the height and thickness of the left and right sides.

This patient who had sinus surgery 15 years previously presented with recurrent bilateral sinusitis involving the ethmoid and maxillary sinuses as shown by computed tomography (CT). Of note was the CT finding of marked differences in the ethmoid roof on the right and left sides. There was a significant difference in the height of the ethmoid roof and a marked difference in the thickness of the bone of the right and left ethmoid roof.

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