• Federico E Minghinelli, Derek O Pipolo, Martín Bourguet, Federico Sánchez González, Roberto S Zaninovich, Francisco Sanz, and Rodolfo Recalde.
• Department of Neurological Surgery, Hospital de Clínicas "José de SanMartín", School of Medicine, University of Buenos Aires, Buenos Aires, Argentina. Electronic address: minghinelli.f@gmail.com.
• World Neurosurg. 2024 Jul 1; 187: e740e748e740-e748.

ObjectivesPerform radiologic measurements and analysis of normal brain computed tomography (CT) scans; delineate a new ventricular entry point from cutaneous landmarks, highlighting the potential surgical implications of these findings.MethodsSix radiologic distances (AR; BR; AL; BL, C, and D) were measured in normal brain CT scans using Horos software. Statistical analysis of the measurements was performed with minitab18 software based on age, sex, and side.Results132 brain CT scans were analyzed, yielding the following mean results: AR distance: 2.1 cm; BR distance: 7 cm; AL distance: 2.1 cm; BL distance: 7.1 cm; C distance: 12.4 cm; D distance: 7 cm; new ventricular entry point: 12.4 cm posterior to the nasion, and 2.1 cm lateral to the midline.ConclusionsThe freehand technique for accessing the lateral ventricles is a common neurosurgical procedure but is often accompanied by complications. To address this, we suggest a novel entry point for ventricular access, determined by cutaneous reference points. This point is situated 12.4 cm posterior to the nasion along the midline and 2.1 cm lateral to the midline. Although our findings may play a role in presurgical planning for ventricular pathologies, future prospective studies are warranted.Copyright © 2024 Elsevier Inc. All rights reserved.

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