f) Cysts and Hydrocephalus

i) Communicating and obstructive hydrocephalus

ii) Arachnoid cyst

iii) Colloid cyst

iv) Rathke cleft cyst

v) Neuroepithelial cyst

vi) Disorders of CSF hydrodynamics

(1) Increased intracranial pressure from hydrocephalus and shunt malfunction

(2) Intracranial hypotension

(3) Complications of CSF diversion procedures