LA07.4 Arnold-Chiari malformation type I

International Classification of Diseases for Mortality and Morbidity Statistics, 11th Revision, v2024-01


A condition caused by failure of the cerebellum to correctly develop during the antenatal period. This condition is characterised by extension of the cerebellar tonsils into the foramen magnum, without involving the brain stem. This condition may present as asymptomatic. Confirmation is through observation of the cerebellar tonsil extension by imaging.

exclusions

postcoordination

Add Stem and/or Extension codes to form a cluster code which adds detail to the condition.

Has manifestation  - multiple selections are allowed

synonyms

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