Figure 1A. MRI (Preoperatively)(Coronal T2) shows large temporal arachnoid cyst. An other cystic lesion with different signal changes was seen in the left sphenoid sinus causing marked enlargement of the sinus

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