Dr. Danial Tahir, Dr Syeda Tehreem Fatima Kazmi, Dr. Anum Ahad
Aim: The purpose of this study is to determine the role of the External Third Ventriculotomy (ETV) in the treatment of hydrocephalus before or during tumor removal from the posterior fossa tumor. Study Design: A Quasi experimental study. Place and duration: In the pediatric Neurosurgery department of Lahore General Hospital for one-year duration from February 2019 to January 2020. Material and methods: Patients reported for hydrocephalus with tumors of the posterior fossa. A third endoscopic ventriculostomy was performed and the tumors of the posterior fossa were completely or partially removed. Postoperative persistent hydrocephalus was treated with repetitive ETV or VP shunt. Results: The study population consisted of 8 patients with a majority of men (6 men 75% and 2 women 25%). The age group was between 5 and 40 years old and their average age was 20.2. Postoperative bypass was not required in 7 patients (87.5%). Conclusion: ETV is an alternative and effective treatment for hydrocephalus associated with posterior fossa tumors, avoiding external drainage or shunts. Reduces the risk of hydrocephalus after resection. Key words: hydrocephalus, Nuroendoscopy, posterior fossa tumors, Endoscopic third ventriculostomy (ETV).