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AJNR - American Journal of Neuroradiology

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American Journal of Neuroradiology 20:1252-1257 (8 1999)
© 1999 American Society of Neuroradiology

ARTICLE

Use of Diffusion-Weighted MR Imaging in Differential Diagnosis Between Intracerebral Necrotic Tumors and Cerebral Abscesses

Brigitte Desprechins^,a, Tadeusz Stadnik^a, Guus Koerts^a, Wael Shabana^a, Catherine Breucq^a and Michel Osteaux^a

^a From the Departments of Radiology and Medical Imaging (B.D., T.S., W.S., C.B., M.O.) and Neurosurgery (G.K.), University Hospital V.U.B., Brussels, Belgium.

Summary: The differential diagnosis between intracerebral necrotic tumors and cerebral abscesses is frequently impossible with conventional MR imaging. We report two cases of cerebral abscesses that showed high signal on diffusion-weighted echo planar imaging and a strongly reduced apparent diffusion coefficient. This appearance was not present in our cases of necrotic/cystic gliomas (eight cases) and necrotic metastases (two cases). We believe that diffusion-weighted MR imaging may be a diagnostic clue in cases of cerebral "ring-enhancing" masses.

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