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Diffusion-weighted MR images and pineoblastoma: diagnosis and follow-up

DOI: 10.1590/S0004-282X2008000100015

Keywords: pineoblastoma, magnetic resonance imaging, diffusion-weighted imaging.

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pineoblastomas are uncommon pineal tumors, which demonstrate rapid growing and poor prognosis. we report the case of a 43-year-old man with an enhancing pineal region mass, which showed restriction of the diffusion on diffusion-weighted (dw) mr images. the surgical biopsy defined the diagnosis of pineoblastoma and the therapy was initiated with radiation and chemotherapy. three months later, the follow-up mr imaging showed areas suggestive of necrosis and the dw images demonstrate no significant areas of restricted diffusion. the differential diagnosis of pineal region masses that could show restriction of diffusion is discussed.


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