Craniotomy and fenestration of membranes is one of the main treatment options for symptomatic intracranial arachnoid cysts. Open surgery advantages include, direct inspection of the cyst, biopsy sampling, fenestration in multilocular cysts and, in certain locations, cyst communication to basal cisterns 1).
Neuroendoscopic fenestrations.
Microsurgical fenestrations +/- marsupialisation