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A Pacchionian Puzzle

  • M. Nazir Khan (a1), Brett H. Shaw (a2), Carla J. Wallace (a1) and Luanne Metz (a3)


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Corresponding author

Correspondence to: Brett Shaw, Department of Emergency Medicine, University of Calgary, C231 3280 Hospital Dr. NW, Calgary, AB T2N 4Z6, Canada. Email:


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1. Ogul, H, Kantarci, M. An unusual cause of progressive headache: herniation of the cerebellar gyrus into the intraosseous arachnoid granulation. Headache 2017;57:778–9.
2. Trimble, CR, Harnsberger, HR, Castillo, M, Brant-Zawadzki, M, Osborn, AG. “Giant” arachnoid granulations just like CSF?: NOT!!. Am J Neuroradiol. 2010;31(9):1724–8.
3. Kan, P, Stevens, EA, Couldwell, WT. Incidental giant arachnoid granulation. Am J Neuroradiol. 2006;27(7):1491–2.
4. Lee, MH, Kim, H-J, Lee, IH, Kim, ST, Jeon, P, Kim, KH. Prevalence and appearance of the posterior wall defects of the temporal bone caused by presumed arachnoid granulations and their clinical significance: CT findings. Am J Neuroradiol. 2008;29(9):1704–7.
5. Liebo, GB, Lane, JJ, Van Gompel, JJ, Eckel, LJ, Schwartz, KM, Lehman, VT. Brain herniation into arachnoid granulations: clinical and neuroimaging features. J Neuroimaging 2016;26(6):592–8.


A Pacchionian Puzzle

  • M. Nazir Khan (a1), Brett H. Shaw (a2), Carla J. Wallace (a1) and Luanne Metz (a3)


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