In this issue of Neurosurgery Clinics, guest editors Drs. David D. Limbrick and Jeffrey Leonard bring their considerable expertise to Chiari I Malformation. Top experts in the field cover key topics such as comorbidities associated with Chiari I malformation; orthostatic intolerance and Chiari I malformation; clinical manifestations of Chiari I malformation; imaging in Chiari I malformation; posterior fossa decompression for Chiari I malformation; and more. Contains 21 relevant, practice-oriented topics sociodemographics of Chiari I malformation; Chiari I malformation and sleep disordered breathing; complex Chiari: diagnosis, evaluation, and treatment; new insights into craniovertebral junction instability in Chiari I malformation; spine deformity associated with Chiari I malformation and syringomyelia; and more.  Provides in-depth clinical reviews on Chiari I malformation, offering actionable insights for clinical practice.  Presents the latest information on this timely, focused topic under the leadership of experienced editors in the field. Authors synthesize and distill the latest research and practice guidelines to create clinically significant, topic-based reviews.