It's a clinical prospective observational study that was conducted on 24 patients of both genders with different ages who presented with manifestations of posterior fossa lesions and increased intracranial pressure at the Neurosurgery departments, Sohag University hospital, Sohag and Qena University hospital, South Valley University,Egypt in the period from March2015 to March 2017. A complete clinical assessment was done, a final diagnosis was made and ETV was done for all patients.
Patients were followed up within one month post-operatively. Data was analyzed using the SPSS (version 16.0).
