Restricted diffusion within ring enhancement is not pathognomonic for brain abscess.
作者： Sabine Heiland , Kristin Münkel , Marius Hartmann , Clemens Sommer , Olav Jansen
DOI:
关键词: Pathognomonic 、 Brain abscess 、 Central nervous system disease 、 Effective diffusion coefficient 、 Medicine 、 Abscess 、 Differential diagnosis 、 Metastasis 、 Radiology 、 Restricted Diffusion
摘要: BACKGROUND AND PURPOSE: Recent experience suggests that diffusion-weighted MR imaging may be decisive in the differential diagnosis of ring-enhancing cerebral lesions. Whether restricted diffusion within a mass lesion is pathognomonic for abscess was studied. METHODS: Seventeen patients with lesions (three abscesses, six glioblastomas, eight metastases) on conventional contrast-enhanced T1-weighted images were examined echo-planar imaging. Apparent coefficient (ADC) maps and ADCs calculated all Lesions signs intralesional hemorrhage unenhanced excluded. RESULTS: The central portion glioblastomas seven metastases showed unrestricted diffusion, whereas two three abscesses (low ADC values) their cavity. However, also found one metastasis, postoperative cavity larger nondependent portion. CONCLUSION: In lesions, might characteristic but not abscess, as low values brain metastases.
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