Strabismus after endoscopic third ventriculostomy.

Until recently, the treatment of choice for noncommunicating hydrocephalus included the use of valve-regulated shunts such as the ventriculoperitoneal shunt. High failure rates and multiple complications have led neurosurgeons to use other techniques. Endoscopic third ventriculostomy (ETV) is becoming popular as treatment for noncommunicating hydrocephalus when standard shunts have failed.(1) We present 2 adolescents who developed exotropia, hypertropia, and diplopia after endoscopic third ventricle surgery.