The anterior ethmoidal bulla arises from the lamina papyracea just behind the uncinate process. The space between the posterior free margin of the uncinate process and the anterior surface of the ethmoidal...
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![The Ethmoidal Bulla [Right]](https://medtube.net/images/min/a250250686b6dbef13c046febf235d77/149/112/1 "The Ethmoidal Bulla [Right]")