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  • Title: An Alternative Route to the Posterior Half of the Third Ventricle: The Transoccipital Horn Approach. Technical Note.
    Author: Muscas G, Battista F, Lastrucci G, Della Puppa A.
    Journal: World Neurosurg; 2019 Dec; 132():223-229. PubMed ID: 31518749.
    Abstract:
    BACKGROUND: Lesions arising or abutting in the posterior half of the third ventricle are approached through established routes to avoid damage of essential brain structures. Occasionally, the features of the lesion require rethinking these traditional routes and tailoring the surgical approach to cause fewer debilitating sequelae to the patient. We introduce a modification of previously described transcortical approaches to lesions of the posterior third ventricle. The technique and possible indications are discussed. METHODS: Two cases of posterior third ventricle tumors are presented. In both patients, a small posterior fossa and large tentorial veins located along the surgical route, as well as the position of the lesion underneath the internal cerebral veins, encouraged the concept of a novel transoccipital horn approach that was developed to access the tumor with less postoperative deficits. RESULTS: Both lesions were removed with transitory postoperative visual deficits. CONCLUSIONS: The transoccipital horn approach is a feasible alternative to other surgical routes to the posterior part of the third ventricle in cases of particularly challenging anatomy and tumor characteristics. It allows reaching the lesion along its major axis, fully exploiting the natural space created by the tumor in its growth and avoiding the internal cerebral veins.
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