What does SAS stand for?

The sinus receives blood from external and internal veins of the brain and the cerebrospinal fluid from subarachnoid space.

Introduction Schizencephaly is a rare CNS malformation consisting of a full-thickness CSF-filled parenchymal cleft lined by grey matter (pathognomonic) extending usually from the subarachnoid space to the subependyma of the lateral ventricles.

Normal flow and absorption through the subarachnoid space is dependent on proper CSF pressure in the head (called intracranial pressure).

This overlies the subarachnoid space filled with cerebrospinal fluid (CSF).

The leptomeninges line the subarachnoid space, in which the cerebrospinal fluid (CSF) flows.

1) This is well known to be related to the inflammatory reaction within the subarachnoid space in patients with cysticercotic arachnoiditis, independent of the stage of the infection, and that is the reason why patients with hydrocephalus due to cysticercotic arachnoiditis frequently have a poor prognosis, since the mortality in these patients is directly related to the number of surgical interventions done to replace the shunt.

The subarachnoid space was identified and confirmed by return of clear CSF freely to the hub of the spinal needle and a positive aspiration of CSF with a syringe.