The risk of hydrocephalus in posterior fossa tumour is quite high (71- 90%). cerebrospinal fluid (CSF) diversion procedures like ventriculoperitoneal (VP) shunt. Endoscopic third ventriculostomy (ETV) and external ventricular drainage (EVD) are emergency procedures and may improve symptoms like headache and vomiting. However. https://www.ealisboa.com/flash-choice-Sten-Jacket-M-flash-find/