Hi my son is 16 months old and from the age of 8 weeks he was diagnosed with a moderate sized posstereier fossa arachnoid cyst can the cyst be surgically removed the measurements of the cyst are 4.3cm (AP) 4.1cm ( transverse) 4.2cm (cranioaudal)There is tentorium and transverse dural venous sinus and there is expansion of the left posterior fossa. The left cerebellar hemisphere is also slightly hypoplastic and anteriorly displaced as a result of the arachnoid cyst

Summarized question: What is the treatment given for an arachnoid cyst?