Figure 3.
Further anatomic features to recognize preoperatively. (A) Left-sided anterior ethmoid artery. (B) Bilateral posterior ethmoid arteries. (C) Bilateral lamina papyracea erosion. (D) An Onodi cell identified by the transverse septation.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.