Normal pressure hydrocephalus (NPH): MRI features

Evidence-based neurology checklist on normal pressure hydrocephalus (nph): mri features: MRI measurements Evans index of ≥ 0.3: Callosal angle of >40 degrees Mamillopontine distance of <1cm Ventricular features Cortical features Post-shunt features

MRI measurements

  • Evans index of ≥ 0.3:
  • Callosal angle of >40 degrees
  • Mamillopontine distance of <1cm

Ventricular features

Cortical features

Post-shunt features

References

  1. Relkin N, Marmarou A, Klinge P, et al. Diagnosing idiopathic normal pressure hydrocephalus. Neurosurgery 2005; 57:S4-S16.
  2. Bhidayasiri R, Waters MF, Giza CC. Neurological Differential Diagnosis. A Prioritized Approach. Blackwell Publishing Massachusetts 2005 p 429.
  3. Lee WJ, Wang SJ, Hsu LC, Lirng JF, Wu CH, Fuh JL. Brain MRI as a predictor of CSF tap test response in patients with idiopathic normal pressure hydrocephalus. J Neurol 2010: 257:1675-1681.
  4. Lilja-Lund O, Kockum K, Hellström P, Söderström L, Nyberg L, Laurell K. Wide temporal horns are associated with cognitive dysfunction, as well as impaired gait and incontinence. Sci Rep 2020; 10:18203.
  5. Narita W, Nishio Y, Baba T, et al. High-convexity tightness predicts the shunt response in idiopathic normal pressure hydrocephalus. Am J Neuroradiol 2016 (Epub ahead of print).
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