On the right, at the junction of the transverse and sigmoid sinus, a laterally projecting diverticulum is present, distal to a focal stenosis secondary to an arachnoid granulation appearing to contain brain tissue. The bony plate between the sinus and the mastoid air cells is intact although in some areas it is markedly thinned.
The pituitary fossa appears partially empty (difficult to assess on axial imaging). Optic nerve sheaths are difficult to assess.