Arachnoid granulation (straight sinus)
Normal prominent structure found in the straight sinus. SCan otherwise unremarkable.
MRI Brain (selected images)
Loading Stack -
0 images remaining
Prominent arachnoid granulation within the straight sinus.
Arachnoid granulations, also known as a Pacchionian granulation, are projections of the arachnoid membrane (villi) into the dural sinuses that allow CSF entrance from the subarachnoid space into the venous system.