File talk:Post FESS Maxillary Ostium.png
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Are we sure that is a maxillary ostium? I'm not saying it's too big to be a maxillary ostium, but I'm trying to imagine what vantage point was used to acquire this picture. That image has way too much depth to be a maxillary sinus.
Are we sure that isn't just the back of the nose and that is the sphenoid in the background?