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Neuroendoscopic transventricular transchoroidal approach for access to the posterior zone of the third ventricle or pineal region

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Abstract

The endoscopic transventricular transchoroidal approach facilitates entry into the posterior part of the third ventricle, allowing a visualization field from the foramen of Monro to the pineal region through this anatomical corridor. Combined surgery to treat the target lesion and possible endoscopic third ventriculostomy (ETV) can be performed through a single burr hole. A detailed description of this surgical technique is given, and a series of cases from our center is presented. This retrospective study included patients with lesions in the pineal region or posterior zone of the third ventricle who underwent surgery between 2004 and 2022 in our center for tumor biopsy or endoscopic cyst fenestration. In nine cases, the transchoroidal approach was performed. Demographic and clinical variables were collected: sex, age at diagnosis, clinical presentation, characteristics of the lesion, pathological diagnosis, characteristics of the procedure, complications, subsequent treatments, evolution, follow-up time, and degree of success of the endoscopic procedure. The mean and range of the quantitative variables and frequency of the qualitative variables were analyzed, together with the statistical significance (p < 0.05). Surgical planning was carried out by performing a preoperative MRI, calculating the ideal entry point and trajectory for each case. The preoperative planning of the surgical technique is described in detail. Of our sample, 55.6% were women, with a mean age of 35 years (7–78). The most common clinical presentation was intracranial hypertension (55.6%), with or without a focus. Eight patients presented hydrocephalus at diagnosis. The most frequent procedure was endoscopic biopsy with ETV (66.7%). The pathological diagnosis varied widely. Procedure-related complications included one case of self-limited bleeding of the choroidal fissure at its opening and one intraventricular hemorrhage due to tumor bleeding in the postoperative period. Non-procedure-related complications comprised two ETV failures and one case of systemic infection, while late complications included one case of disease progression and one case of radionecrosis. Four patients died, one due to poor neurological evolution after post-surgical tumor bleeding and three due to causes unrelated to the procedure. The rest of the patients had a favorable evolution and were asymptomatic or stable. The transchoroidal approach through a single burr hole is a feasible and safe option for access to the posterior part of the third ventricle. Proper planning of each case is necessary to avoid complications.

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Authors and Affiliations

  1. Department of Neurosurgery, Hospital Regional Universitario de Málaga, Malaga, Spain

    Laura Cerro Larrazabal, Guillermo Ibáñez Botella, Ángela Ros Sanjuán, Bienvenido Ros López, Sara Iglesias Moroño & Miguel Ángel Arráez Sánchez

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  1. Laura Cerro Larrazabal
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  2. Guillermo Ibáñez Botella
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  3. Ángela Ros Sanjuán
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  4. Bienvenido Ros López
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  5. Sara Iglesias Moroño
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  6. Miguel Ángel Arráez Sánchez
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All authors have contributed by writing or checking the text, or doing the surgeries.

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Correspondence to Laura Cerro Larrazabal.

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Cerro Larrazabal, L., Ibáñez Botella, G., Ros Sanjuán, Á. et al. Neuroendoscopic transventricular transchoroidal approach for access to the posterior zone of the third ventricle or pineal region. Neurosurg Rev 46, 323 (2023). https://doi.org/10.1007/s10143-023-02210-1

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