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Intracranial Hemangiopericytomas:MR and CT Features AJNR 17:1365-1371, Chiechi,M.V.,et al, 1996 See this aricle in Pubmed Article Abstract Thirty of 34 tumors were 4 cm or more in greatest dimension,32 were lobular and only 7 were in the posterior fossa.Hydrocephalus was present in 18,edema in 30 and mass effect in 33.Twenty-three had broad-based dural attachment and 11 had narrow-based attachment.All 26 unenhanced CT scans showed hyperdense tumors;19 were heterogeneous and 7 homogeneous.All 27 contrast-enhanced CT scans showed enhancement;17 were heterogeneous and 10 homogeneous.Bone erosion was present in 17 of 29 hemangiopericytomas imaged with CT.None had hyperostosis or tumor calcifications.On T1 weighted MR images,10 of 17 were isointense.All 14 tumors imaged with contrast-enhanced T1 weighted MR imaging showed enhancement and 13 of these were heterogeneous;eight of the 14 had a"dural tail"sign. Intracranial hemangiopericytomas are multilobulated,extra-axial tumors, sometimes associated with narrow-based dural attachment and bone erosion. Unlike with meningiomas,hyperostosis and intratumorial calcification are not present.

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(click to filter results - removes previous filter) CAT scan CAT scan,abnormal hemangiopericytomas MRI MRI,abnormal neoplasm,intracranial neoplasm,primary intracranial

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