Figure 20. 41-year-old woman with central nervous system Wegener's granulomatosis. An axial T1 weighted image post intravenous gadolinium enhancement. Frontal sinus disease is shown (black arrow), and adjacent dural thickening is also present in the near and adjacent area (white arrow). Enhancing diffuse or focal dural thickening is the most common manifestation of cerebral Wegener's granulomatosis.