Figure 1C. CT (Preoperatively) (Axial) shows lesion that filling and expanding sphenoid sinus; resorption and displacement of the squamous portion of the temporal bone also seen

From

Arachnoid Cyst in the Sphenoid Sinus Presented with Headache and Proptosis

Asif Salimov, Serdar Ozer, Celil Gocer, Burce Mocan, Riza Onder Gunaydin, Omer Taskin Yucel

American Journal of Medical Case Reports. 2014, 2(11), 256-258 doi:10.12691/ajmcr-2-11-9