Normative cerebellar tonsil position in healthy individuals: a systematic review and meta-analysis

The pooled estimate establishes a normative reference for the position of the cerebellar tonsils in asymptomatic individuals with normal craniospinal MRI findings. This information can assist in the anatomical interpretation of craniospinal imaging. However, considerable variability and geographic clustering can limit its general applicability. Clinical decisions should continue to be guided by symptoms, and future studies should use standardised imaging techniques and broader sampling methods to enhance diagnostic relevance.