|Print Date:||May 20, 2013, 12:17 am|
|Title||Calcification in glial tumors|
|Text||For GLIAL tumors - Old Elephants Age Gracefully
O - oligodendroglioma (~90%)
E - ependymoma (50 - 60%)
A - astrocytoma (20-25%)
G - glioblastoma (5 - 15%)
NOTE: Since astrocytomas are much more common than oligodendroglioma, a calcified primary tumor is more likely to be astrocytic.
NOTE: Calcification in brain tumors is usually a dystrophic process (dead tissue and old hemorrhage). Therefore delayed or later Dx in older tumors is likely to increase the incidence of calcification. Later presentation is more common in more slowly growing tumors. These numbers were derived from plain film detection of calcification prior to the CT era. Earlier Dx of lesions by MR/CT could potentially decrease the incidence of Ca++ by finding lesions before dystrophic changes occur. However, the overall increased sensitivity of CT in detecing Ca++ should increase the incidence.
|Contributor||James G. Smirniotopoulos, M.D. (Uniformed Services University)|
|Peer Reviewer||James G. Smirniotopoulos, M.D. (Uniformed Services University)|
|Record Number||: 847|
|Location:||Brain and Neuro|
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