• World Neurosurg · Mar 2019

    Stereotactic Internal Shunt Placement in Congenital Intracranial Cysts.

    • Markus Lenski, Annamaria Biczok, Jörg-Christian Tonn, and Friedrich-Wilhelm Kreth.
    • Department of Neurosurgery, Klinikum der Universität München, Campus Großhadern, Munich, Germany. Electronic address: markus.lenski@med.uni-muenchen.de.
    • World Neurosurg. 2019 Mar 1; 123: e670-e677.

    IntroductionTreatment of symptomatic intracranial cysts remains a controversial issue. We present a risk/benefit profile of a minimally invasive, not yet described, stereotactic internal shunt implantation technique. The provided data might serve as a reference against which other treatment modalities could be compared.MethodsFrom our prospective database, we identified a consecutive series of patients with symptomatic, untreated cysts who had undergone internal shunting from 2009 to 2017. We estimated the rates of clinical symptom improvement (RCSI), cyst reduction, total complications, and long-term complications. A minimal follow-up of 6 months was required. The prognostic factors were obtained from logistic regression models. Cyst recurrence-free survival was calculated using the Kaplan-Meier method. The outcomes data were compared with those from reported alternative treatment strategies using χ2 statistics.ResultsWe included 38 patients. The cyst locations differed greatly and included the cerebellum (n = 2), brainstem (n = 5), and pineal area (n = 4). Cyst-associated hydrocephalus (n = 6) resolved after treatment. The 2-year cyst recurrence-free survival rate was 97%. The RCSI and rate of cyst reduction, total complications, and long-term complications was 91%, 97%, 11%, and 2.6%, respectively. We did not find any risk factors associated with the rate of total complications. The RCSI and rate of total and long-term complications compared favorably (P < 0.01) with the corresponding estimates of alternative treatments (P < 0.01).ConclusionsThe described stereotactic internal shunt implantation technique is safe and can be successfully applied for treatment of cystic formations in any location in the brain.Copyright © 2018 Elsevier Inc. All rights reserved.

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