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- W2100485002 abstract "<b>BACKGROUND AND PURPOSE:</b> Arachnoid granulations (AGs) of the posterior wall of the temporal bone are a rare cause of spontaneous CSF leakage. The purpose of this study was to investigate the prevalence and appearance of presumed AGs, evidenced by the posterior wall defects of the temporal bone with lobulated or scalloped margins on CT scans. <b>MATERIALS AND METHODS:</b> We retrospectively reviewed CT scans of the temporal bone obtained in 1255 patients (573 men and 682 women; mean age, 42 years). We evaluated the prevalence, multiplicity, size, and location of presumed AGs in the posterior wall of the temporal bone. Preservation of the posterior wall of the mastoid air cells was also investigated and correlated with clinical features. <b>RESULTS:</b> Thirty patients (2.4%), including 13 men and 17 women, aged 27–88 years (mean, 55 years), showed a total of 40 presumed AGs on CT scans. Their prevalence tended to increase with age. They were most commonly located at the lateral third of the temporal bone at a level of or above the common crus. Although 15 lesions in 11 patients also caused focal loss of the posterior wall of the mastoid air cells, symptomatic CSF leakage was found in only 2 patients, in both of whom the adjacent mastoid air cells were also opacified on CT scans. <b>CONCLUSION:</b> Although rare, radiologists need to be familiar with the posterior wall defects of the temporal bone caused by presumed AGs on CT scans, because they might cause CSF leakage." @default.
- W2100485002 created "2016-06-24" @default.
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- W2100485002 date "2005-05-23" @default.
- W2100485002 modified "2023-10-11" @default.
- W2100485002 title "Magnetization transfer MRI demonstrates spinal cord abnormalities in adrenomyeloneuropathy" @default.
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- W2100485002 doi "https://doi.org/10.1212/01.wnl.0000164458.02141.06" @default.
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