Usefulness of CT and MRI in the dura matal infiltration was assessed. Subjects were 21 patients who underwent skull base surgery

Abstract

MRI was speculated to be a necessary preoperative examination because it visualized tumor infiltration more clearly than CT. The following two standards were instituted for diagnosing dura matal infiltration : (1) dura matal thickening and (2) dura matal pressure exerted by enlarged tumor. Based on the fact that cases with these symptoms showed dura matal infiltration, we considered MRI results to be useful diagnostic standards.