Figure 23b. (a) Presurgical axial CT scan shows a mass primarily in the sellar area (arrow). A transmaxillary surgical approach was used to resect the tumor. (b) Axial contrast-enhanced T1-weighted MR image obtained 1 year after surgery shows recurrent tumor at the surgical site in the nasal region (arrows). (c) Postsurgical sagittal CT scan shows recurrent tumor in the clival area (arrow).