Fully endoscopic posterior fossa decompression for Chiari malformation type I: illustrative case.

Background: Surgery for symptomatic Arnold-Chiari malformation type I involves posterior fossa decompression. There are various approaches, including endoscope-assisted ones. New possibilities and fields of application of fully endoscopic techniques are currently being developed since new and advanced endoscopic equipment and instrumentation are available.
Observations: The authors describe the case of a fully endoscopic microsurgical procedure in a 30-year-old female patient with progressive vertigo who was diagnosed with Chiari malformation type I. Neuronavigation and neuromonitoring were used during the surgery.
Lessons: Fully endoscopic surgery can be successfully performed in patients with Chiari malformation I. Intraoperative neuromonitoring and neuronavigation increase safety during this procedure.