British journal of neurosurgery
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Case Reports
Pyomyelia: an intramedullary spinal abscess complicating lumbar lipoma with spina bifida.
We report a case of spinal dysraphism, complicated by an intramedullary spinal abscess (IMSA). The magnetic resonance images of this case are shown and the pathophysiology of this condition is discussed.
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Paraffin sections of 305 meningeal tumours were analysed for the presence of nucleolar organizer region (Ag-NOR) in the neoplastic cells, using a one step silver-colloidal staining method. The mean (+/- SEM) Ag-NOR counts were 2.73 +/- 0.21 for atypical and 2.91 +/- 0.18 for papillary variants of meningioma. ⋯ Differences in the mean Ag-NOR numbers between meningothelial and transitional variants in their primary and recurrent tumours were not significantly different (p > 0.05). The results of this study indicates that estimation of Ag-NORs can be applied in predicting the aggressive clinical behaviour of primary meningeal tumours.