• Christina Vorbau, Jörg Baldauf, Joachim Oertel, Michael R Gaab, and Schroeder Henry W S HWS Department of Neurosurgery, University Medicine Greifswald, Germany..
• Department of Neurosurgery, University Medicine Greifswald, Germany. Electronic address: vorbauc@uni-greifswald.de.
• World Neurosurg. 2019 Feb 1; 122: e176-e185.

BackgroundEndoscopic resection of colloid cysts is a widely accepted treatment option instead of microsurgery. However, there is still a debate about a potentially higher rate of incomplete resections and recurrence.ObjectiveThe aim of this retrospective study was to evaluate long-term results after endoscopic removal of colloid cysts.MethodsTwenty patients underwent endoscopic treatment in our department. Eighteen patients agreed to follow-up examinations. In 17 patients, magnetic resonance images were obtained.ResultsTotal cyst resection was achieved in 16 procedures. In 1 patient, only plexus coagulation and widening of the ipsilateral foramen of Monro were performed. In 3 patients, small remnants of the cyst membrane were left behind. Conversion to microsurgery became necessary in 1 patient. Mild temporary complications occurred in 6 patients. Preoperative symptoms were completely relieved in 16 patients and improved in 2 patients. The average follow-up period was 188 months. In the patient with plexus coagulation, the cyst did not change. Recurrence occurred in 2 of 3 patients with cyst remnants. To date, no cyst remnant or recurrence has caused any symptoms or required surgical treatment.ConclusionsOur results indicate that endoscopic treatment of colloid cysts is a safe and effective treatment option that provides excellent long-term results. However, we determined that a significant risk for recurrence exists when even small parts of the cyst capsule were left behind. Therefore, we advocate an attempt at total endoscopic cyst resection.Copyright © 2018 Elsevier Inc. All rights reserved.

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