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. 2001 Sep;177(3):709-12.
doi: 10.2214/ajr.177.3.1770709.

Diffusion-weighted MR imaging of rim-enhancing brain masses: is markedly decreased water diffusion specific for brain abscess?

G A Tung  1 , P Evangelista, J M Rogg, J A Duncan 3rd
Affiliations

Diffusion-weighted MR imaging of rim-enhancing brain masses: is markedly decreased water diffusion specific for brain abscess?

G A Tung et al. AJR Am J Roentgenol. 2001 Sep.

Abstract

Objective: This retrospective study investigated the specificity of restricted water diffusion for the diagnosis of brain abscess. Two of five rim-enhancing brain masses with restricted water diffusion (apparent diffusion coefficient of 0.79 [10(-3) mm(2)/sec] or less) were brain abscesses, but diagnoses in the other cases were metastatic squamous cell carcinoma (two cases) and radiation necrosis.

Conclusion: Although an important diagnostic sign, restricted water diffusion is not specific for brain abscess.

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