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  • Title: Endoscopic Supracerebellar Infratentorial Transpineal Approach for Posterior-Medial Thalamic Lesions: Surgical Technique and Clinical Experience.
    Author: Xie T, Liu S, Zhang X, Yang L, Liu T, Chen P, Li Z.
    Journal: Oper Neurosurg (Hagerstown); 2024 Aug 01; 27(2):187-193. PubMed ID: 38451089.
    Abstract:
    BACKGROUND AND OBJECTIVES: Accessing lesions in the posterior-medial thalamus can be challenging because of their deep location and intricate neurovascular anatomy. This study aims to describe the techniques and feasibility of the endoscopic supracerebellar infratentorial transpineal approach for treating posterior-medial thalamus lesions. METHODS: We reviewed and analyzed the clinical outcomes and endoscopic surgical experience of 11 patients with posterior-medial thalamic lesions. The first 4 cases used the endoscopic midline supracerebellar infratentorial transpineal approach, whereas the subsequent 7 cases used the endoscopic contralateral paramedian supracerebellar infratentorial transpineal approach. All cases involved the upward transposition of the pineal gland to access the posterior-medial thalamus. The extent of resection and the endoscopic techniques were the main focus of analysis. Neurological examinations and MRI/computed tomography follow-up were conducted for 3-12 months after surgery. RESULTS: The pathology of the group included 6 gliomas, 1 cavernous malformation, 1 inflammation, 1 melanoma, and 2 hematomas. All 11 patients achieved gross total resection (6 patients, 54.5%) or subtotal resection (5 patients, 45.5%) with no new neurological deficits. Most patients (9 patients, 81.8%) experienced improvement in Karnofsky Performance Status after surgery. Postoperative hydrocephalus occurred in 2 patients (18.2%) and was relieved by endoscopic third ventriculostomy. CONCLUSION: The endoscopic supracerebellar infratentorial transpineal approach is an effective approach for removing posterior-medial thalamic lesions that require access through the third ventricle surfaces of the thalamus. The endoscopic contralateral paramedian supracerebellar infratentorial transpineal approach provides a more superior and lateral view of the posterior-medial thalamic lesions.
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