What are the CT/MRI criteria for diagnosis of chronic hydrocephalus?

Updated: Jun 04, 2018
  • Author: Stephen L Nelson, Jr, MD, PhD, FAACPDM, FAAN, FAAP; Chief Editor: Jasvinder Chawla, MD, MBA  more...
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CT/MRI criteria for chronic hydrocephalus include the following:

  • Temporal horns may be less prominent than in acute hydrocephalus.

  • Third ventricle may herniate into the sella turcica.

  • Sella turcica may be eroded.

  • Macrocrania (ie, occipitofrontal circumference >98th percentile) may be present.

  • Corpus callosum may be atrophied (best appreciated on sagittal MRI). In this case, parenchymal atrophy and ex-vacuo (rather than true) hydrocephalus from a neurodegenerative disease should be considered.

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