Differentiation of extra- from intra-axial posterior fossa lesions is sometimes not possible on computed tomography. Six cases are presented wherein the lesion appeared to be intra-axial on computed tomograms yet angiographically and surgically proved to be extra-axial. False localization on computed tomography occurs with slowly growing masses which burrow into brain parenchyma.
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| http://dx.doi.org/10.1148/127.3.675 | DOI Listing |
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