An oligodendroglioma in the right frontoinsular region.

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An oligodendroglioma in the right frontoinsular region. An oligodendroglioma in the right frontoinsular region. A, CT scan shows patchy calcification inside the tumor. B, SWI magnitude image shows hypointense signal intensity inside the tumor but cannot identify whether the hypointensity is hemorrhage or calcification. C, On the SWI phase image, calcification is identified and matches the CT results well. S. Mittal et al. AJNR Am J Neuroradiol 2009;30:232-252 ©2009 by American Society of Neuroradiology