Fenestration of the septum pellucidum

fenestrated septum pellucidum

Fenestration of the septum pellucidum is one of the findings in chronic obstructive hydrocephalus.

Obstructive hydrocephalus, also known as non-communicating hydrocephalus is simply hydrocephalus due to obstruction of CSF flow out of the ventricles.

Frequent causes of obstructive hydrocephalus include:

Features of long standing obstructive hydrocephalus are:

  • -marked dilatation of the lateral and third ventricles
  • -thinned and elevated corpus callosum.
  • -depression of the fornices
  • -the floor of the 3rd ventricle is plastered to the skull base, obliterating the suprasellar cistern.
  • -rounding of the infundibular, optic and pineal recesses
  • -ballooning of the suprapineal recess
  • -fenestration of the septum pellucidum

Treatment options include:

Reference: Primer of Diagnostic Imaging by Weissleder

Credit: Dr Frank Gaillard