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AJNR - American Journal of Neuroradiology

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American Journal of Neuroradiology 23:109-112, January 2002
© 2002 American Society of Neuroradiology

BRAIN

Diffusion-Weighted Imaging and Apparent Diffusion Coefficient Maps in a Case of Intracerebral Abscess with Ventricular Extension

Shadab Rana^a, Sait Albayram^a, Doris D.M. Lin^a and David M. Yousem^a

^a From the Division of Neuroradiology, Department of Radiology and Radiological Sciences, The Johns Hopkins Hospital, Baltimore, MD

Address reprint requests to David M. Yousem, MD, Division of Neuroradiology, Department of Radiology and Radiological Sciences, The Johns Hopkins Hospital, Baltimore, MD 21287

Summary: Previous findings have demonstrated the diagnostic usefulness of diffusion-weighted imaging in depicting specific features of a brain abscess. We report a case of a cerebral abscess, which ruptured into the ventricular system, including its findings on both diffusion-weighted images and apparent diffusion coefficient (ADC) maps. Purulent material within the left lateral ventricle, similar to that of the central abscess cavity, was strongly hyperintense on diffusion-weighted images. However, variable signal intensity changes were observed on the ADC map; these probably corresponded to regional variation of the concentration of protein in the purulent material. In this case, both diffusion-weighted images and ADC maps were important and complementary in the evaluation of ventricular extension of an intracerebral abscess.

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