• Joachim Oertel, Sonja Vulcu, Leonie Eickele, Wolfgang Wagner, Giuseppe Cinalli, and Jana Rediker.
• Department of Neurosurgery, Saarland University Medical Center, Homburg/Saar, Germany. Electronic address: oertelj@freenet.de.
• World Neurosurg. 2017 Mar 1; 99: 556-565.

ObjectiveEndoscopic third ventriculostomy (ETV) is a safe and less-invasive treatment strategy for patients with obstructive hydrocephalus and provides excellent outcome. Nevertheless, repeat ETV in cases of ETV failure is a controversial issue.MethodsBetween 1993 and 1999, 113 patients underwent a total of 126 ETVs at the Department of Neurosurgery, Mainz University Hospital. Obstructive hydrocephalus was the causative pathology in all cases. A very long-term follow-up of up to 16 years could be achieved. All medical reports of patients who received ETV were reviewed and analyzed with focus on ETV failure with following repeat ETV and its initial as well as very long-term success.ResultsThirty-one events of ETV failure occurred during the follow-up period. Thirteen patients underwent repeat ETV: 3 patients during the first 3 months (early repeat ETV), the other 10 patients after 7-78 months (late repeat ETV, mean 33 months). All repeat ETV were performed without complications. Follow-up evaluation after successful repeat ETV ranged from <1 month up to 14 years (mean 7 years). Of the 3 early revisions, 2 failed and 1 other patient died during follow-up whereas only 2 of the late repeat ETV failed. Very long-term success rate of late repeat ETV up to 14 years yielded 80%.ConclusionsRepeat ETV in cases of late ETV failures represents an excellent option for cerebrospinal fluid circulation restoration up to 14 years of follow-up. Repeat ETV in early ETV failure in contrast is not favored by the performing surgeons; and factors of ETV failure should be analyzed very carefully before a decision for repeat ETV is made.Copyright © 2017 Elsevier Inc. All rights reserved.

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