Extensive diffuse thickening of diploic space of the skull vault extending to the skull base bones with no obvious space occupying lesions. The paranasal sinuses and the mastoid air cells are clear. The ventricular systems, sulci/ gyri pattern, Sella and the pituitary are normal and there is no infarction or vascular thrombosis. Visualized cervical spine, cranio-cervical junctions are uneventful.