Spinal neurilemmomas and neurofibromas: central dot sign in postgadolinium MRI |
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Authors: | AD Gouliamos DS Kontogiannis J Androulidakis AE Kalovidouris LJ Vlahos CG Papavasiliou |
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Affiliation: | Department of Radiology, University of Athens, Medical School, Areteion Hospital, Greece. |
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Abstract: | The MR studies of three histologically proven spinal neurilemmomas and neurofibromas were reviewed retrospectively. There were two benign neurilemmomas (schwannomas) and one neurofibroma. The common characteristic of these cases was a central low intensity focus ("dot") seen on postcontrast T1-weighted imaging. The low intensity foci corresponded histologically to a congeries of changes including edema, microcysts, foam cells, hyalinization of blood vessels, old hemorrhage, and dystrophic calcification. |
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