Abstract：Objective: To explore the characteristics of totally calcified meningioma in CT and MRI images, analyze its valueable information, so as to improve the diagosis. Methods: Twenty-three cases(6 males and 17 females, 33~82 years old with the mean age of 61.5) with calcified meningioma proven by operative pathology were retrospectively analyzed. All of them underwent CT scans, while 19 of them were examined by MRI(17 underwent enhanced scans). Results: CT of all the 23 cases showed high density masses. Twenty-one masses were heterogeneous in density on bone-window. Sixteen masses were round in transverse-section. MRI of the tumors showed iso-intensity or slight hypo-intensity in 20 cases, and heterogeneous slightly hyper-intense in 3 patients on T1WI. On T2WI, hypo-intensity were detected mainly in 12 cases with a little iso-intensity or slight hyper-intesity; 6 tumors showed iso-intensity mainly and 5 showed slight hyper-intensity. Among them, 8 cases showed thin circular iso-intensity on both T1WI and T2WI. Twelve cases showed significant enhancement on T1WI, of which progressive enhancement were demonstrated in larger lesions. Dural enhancement was seen in 11 cases. Five cases were found crossing the cerebral falx. Conclusion: CT and MRI examination on completely calcified meningioma can be complementary for each other. A combination of both can reflect the characteristics of the tumor more objectively and comprehensively, and improve the diagnostic accuracy.
2012, Vol. 23 
