Complications of neuroendoscopic third ventriculostomy for hydrocephalus: 1 Intracranial pneumatosis is the most common complication.2 Cerebrospinal fluid leakage and intracranial infection Intracranial infection is a more serious complication of ETV surgery and is often the cause of prolonged hospitalization and increased costs. Although it can be controlled by applying sensitive antibiotics, it is still a fatal risk. Dong Changzheng, Department of Functional Neurosurgery, Hebei Provincial People’s Hospital, China3 Subdural effusion4 Intraventricular hemorrhage Mostly caused by unskilled endoscopic manipulation resulting in injury to the choroid plexus and ventricular wall veins at the front end of the endoscope or straining the local veins by moving the endoscope too far at the interventricular foramen.5 Hypothalamic injury