Sylvian aqueduct stenosis

panels-1

  • A 50-year-old patient had progressive gait disturbance and more recent upper limb clumsiness.
  • The lateral and third ventrciles were very enlarged without periventricular oedema.
  • A web in the inferior sylvian aqueduct, better seen on CISS than T1, was causing impaired CSF outflow.

panels-1

  • A 50 year year old presented with a chronic headache and gait disturbance.
  • MRI showed ventriculomegaly with a periventricular rim of T2-hyperintense oedema.
  • CISS imaging showed a filling defect in the superior Sylvian aqueduct likely to represent a web.
  • CSF flow studies showed absence of pulsatile CSF flow across through the Sylvian aqueduct.