normal pressure hydrocephalus

• clinical triad: dementia, ataxia, urinary incontinence
• CSF flow over convexities obstructed

• etiology:
  • subarachnoid hemorrhage
  • infection
  • previous trauma
  • idiopathic
  • neoplasm

• NM cisternogram:
  • absent or delayed passage of tracer over convexities
  • ventricular reflux of tracer with persistence

© 2002, C.E. Kahn, Jr.
2002-04-18