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. 2016 Jun 17;6:24. doi: 10.4103/2156-7514.184244

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Copyright: © 2016 Journal of Clinical Imaging Science

This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as the author is credited and the new creations are licensed under the identical terms.

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A 25-year-old man, who presented with a history of acute daily headaches over the past 6 months and had a history of chronic coccidioidal meningitis (treated), is diagnosed with chronic hypertrophic basal arachnoiditis and secondary hydrocephalus. Magnetic resonance imaging T1-weighted postcontrast imaging of the brain in axial (a) and coronal (b) view demonstrates marked leptomeningeal hypertrophy with diffuse enhancement involving predominantly the basal cisterns (arrowheads). (c) Magnetic resonance imaging fluid-attenuated inversion recovery postcontrast imaging of the brain in axial view shows a significant enlargement of the lateral ventricles with transependymal migration of cerebrospinal fluid (arrows). These findings are consistent with a hydrocephalus secondary to chronic hypertrophic basal arachnoiditis.