While most intracranial meningiomas have characteristic CT findings, atypical CT features can give a source of error in the diagnosis of meningioma and the significance of them has scarcely been reported. The authors reviewed records of a consecutive senies of 23 patients with meningioma who underwent operation and pathologically proven from January 1984 to December 1986. Among them 7 cases were analyzed as having atypical CT features of meningioma and CT findings were as follows : focal non-enhancing lucency within tumor(5 cases) focal lucency adjacent to tumor (1 case) and focal hyperdensity (1 cases) and these CT findings were closely correllated with pathological findings.