Jonna Maala,Maurice V Bayhon,Erickson Torio,Rhoderick Casis, An Endoscopic Intraventricular Approach in Glioblastoma: A Case Report of an Adult Filipino with Periventricular Mass Surgical Case Reports 2021 2613-5965 http://dx.doi.org/10.31487/j.SCR.2021.11.04 https://www.sciencerepository.org/an-endoscopic-intraventricular_SCR-2021-11-104 Abstract: In this study, we present a case of a 58-year-old female with a 1-year history of a generalized headache who suddenly developed left-sided weakness accompanied by disorientation and changes in mood and behaviour. A cranial MRI plain and contrast revealed a right thalamo-mesencephalic mass with beginning hydrocephalus. The patient underwent endoscopic transventricular septostomy, biopsy of thalamic mass with ventriculoperitoneal shunt insertion under endoscopic guidance. The official histopathology results revealed a WHO Grade IV glioblastoma. The patient was subsequently treated with chemoradiation.Keywords: Intraventricular, periventricular, glioblastoma, endoscope