Diffuse involvement of the skull base, right mastoid, left greater wing of the sphenoid, left orbital roof and left parietal bones with expansion, loss of the normal a homogeneous ground glass appearance. The right orbital roof as well as right parietal bone harbours two large expansile lesions with internal lytic foci causing marked bone deformity. Patent examined skull base foramina.
Right maxillary sinus mucosal thickening.