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![straight_sinus [Neurosurgery Wiki]](https://operativeneurosurgery.com/lib/exe/fetch.php?w=350&tok=23a305&media=straightsinus.png "straight_sinus [Neurosurgery Wiki]")
straight_sinus [Neurosurgery Wiki]
File:Paranasal sinuses numbers.svg - Wikimedia Commons
Sinus & Allergy Tools - NeilMed Pharmaceuticals Inc
