PMC9450867_01
A: (Left) axial CT scan of sinuses shows complete opa-cification of the left sphenoid sinus with dehiscence in the left optic canal (white arrow), opticocarotid recess (black arrow); (Right) MRI shows the cyst with rim enhancement obstructing the sinus ostium (thin arrow), thick arrow shows enhanced sphenoid sinus mucosa. B: (Left) coronal CT scan of sinuses shows a retention cyst (astrix) in the lateral recess of sphenoid sinus, white arrow shows sphenoid sinus; (Right) T2-weighted MRI shows left sphenoid sinus hyper-intense retention cyst (black arrow). C: (Left) coronal CT scan shows sphenoid sinus (white thin arrow) and retention cyst (astrix) without pressured on the optic chiasm, posterior chornea (thick white arrow) and inferior turbinate (black arrow); (Right) MRI shows hyper-intense mass in the sphenoid sinus and its lateral recess (white arrow).
gr1.jpg
PMC9450867_03_gr1.jpg
fig1
MRI showed an RC in the sphenoid sinus (Figure 1B) touching the inferomedial border of the optic nerve.
PMC9450867_02
PMC9450867_03
A: (Left) axial CT scan of sinuses shows complete opa-cification of the left sphenoid sinus with dehiscence in the left optic canal (white arrow), opticocarotid recess (black arrow); (Right) MRI shows the cyst with rim enhancement obstructing the sinus ostium (thin arrow), thick arrow shows enhanced sphenoid sinus mucosa. B: (Left) coronal CT scan of sinuses shows a retention cyst (astrix) in the lateral recess of sphenoid sinus, white arrow shows sphenoid sinus; (Right) T2-weighted MRI shows left sphenoid sinus hyper-intense retention cyst (black arrow). C: (Left) coronal CT scan shows sphenoid sinus (white thin arrow) and retention cyst (astrix) without pressured on the optic chiasm, posterior chornea (thick white arrow) and inferior turbinate (black arrow); (Right) MRI shows hyper-intense mass in the sphenoid sinus and its lateral recess (white arrow).
gr1.jpg
PMC9450867_03_gr1.jpg
fig1
MRI showed an RC in the sphenoid sinus (Figure 1B) touching the inferomedial border of the optic nerve.