• Batu Hergünsel, Bilal Ertuğrul, Fatih Serhat Erol, Murat Gönen, and Metin Kaplan.
• Department of Neurosurgery, Sisli Hamidiye Etfal Medical Practice and Research Center, University of Health Sciences, Istanbul, Turkey. Electronic address: batuhergunsel@gmail.com.
• World Neurosurg. 2024 Nov 13; 193: 791795791-795.

BackgroundHeadache (HA) is the most common symptom impacting the quality of life of patients with Chiari I malformation. While HAs typically present in the occipital or suboccipital regions, and induced by Valsalva maneuver, complex migraine-like HAs referring to frontal or orbital regions also occur. Our study explores the therapeutic potential of C1 nerve root decompression in addition to increasing intracranial compliance in patients with Chiari I malformation.MethodsWe retrospectively analyzed cases operated on for Chiari I malformation, focusing on patients with nonsuboccipital, non-Valsalva induced HAs. Preoperative and postoperative visual analog scale scores and HA frequency were recorded. Surgical technique involved suboccipital craniectomy, C1 laminectomy, cerebellar tonsil reduction, and C1 root decompression.ResultsTwelve patients (10 females, 2 males) aged 22-52 years were included. Preoperative mean visual analog scale score was 8, which improved to 2 or less in 11 patients postoperatively. The mean HA frequency decreased significantly.ConclusionsOur findings suggest that C1 root compression contributes to atypical HAs in Chiari I malformation and that C1 root decompression may improve surgical outcomes.Copyright © 2024 Elsevier Inc. All rights reserved.

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