• Huaiyu Sun, Yue Wang, Shihai Yu, Zifan Li, and Tingzhong Wang.
• Department of Neurosurgery, Tiemei General Hospital of Liaoning Health Industry Group, Tieling, Liaoning, China.
• World Neurosurg. 2020 Nov 1; 143: 183-189.

BackgroundAlthough surgeries for intracerebral hemorrhage remain controversial, endoscopic surgery is considered a promising surgical treatment. The most fatal type of thalamic hemorrhage is the medial type, which is always combined with expansion of the hematoma into the third ventricle. The current endoscopic approach to this lesion involves injury to the mediodorsal nucleus of the thalamus (MDT).Case DescriptionWe report 5 cases of medial thalamic hemorrhage with third intraventricular involvement treated by an endoscopic-assisted translateral ventricular transchoroidal fissure approach. The preoperative average volume of the parenchymal hematomas was 9.63 mL, while the preoperative average volume of the intraventricular hematomas was 23.35 mL. The average surgical duration was 80.6 minutes. No intraoperative MDT incision was needed in any patient. The evacuation rates of parenchymal and intraventricular hematomas were 74.21%-98.84% and 85.89%-99.51%, respectively. Three months after the surgery, the average Glasgow Coma Scale scores improved to 13.8 from 7.2 preoperatively. No ventriculoperitoneal shunt was needed in any patient.ConclusionsThe endoscopic-assisted translateral ventricular transchoroidal fissure approach is a safe and effective approach for evacuation of a medial thalamic hemorrhage with third intraventricular involvement. This approach allows parenchymal hematoma evacuation through the rupture of the third ventricle without incising the MDT in the lateral ventricle.Copyright © 2020 Elsevier Inc. All rights reserved.

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