Purpose To evaluate the causative factors of the false positive CT findings of parametrial invasions of cervial cancer.Materials and Methods: we analysed 17 parametria of 14 patients with the diseases staged over llb on CT, but confirmed to be under stage lla on pathology. The CT findings were retrospectively reviewed, and compared with pathologic findings.Results : The causes of false postive diagnosis of parametrial invasions on CT were prominent cardinal ligaments (n=12), vaginal fornix(n=3), and prominent uterine vessels(n=2).Conclusion : Familiarity with these CT finding may be helpful in avoiding false positive diagnosis of parametrial invasion In patients with uterine cervical carcinoma.