20Developmental anomalies Structural developmental anomalies primarily affecting one body system Structural developmental anomalies of the circulatory system LA90Structural developmental anomalies of the peripheral vascular system LA90.4Peripheral arterial malformations
LA90.42
category
Congenital cerebral nonruptured aneurysm
Definition This is a cerebrovascular disorder in which weakness in the wall of a cerebral artery or vein causes a localised dilation or ballooning of the blood vessel (nonruptured).
Also indexed as
Congenital cerebral nonruptured aneurysm congenital brain aneurysm congenital circle of Willis aneurysm
Nearby in Peripheral arterial malformations
International Classification of Diseases, Eleventh Revision (ICD-11), World Health Organization (WHO) 2019/2021, https://icd.who.int/browse11. Licensed under Creative Commons Attribution-NoDerivatives 3.0 IGO (CC BY-ND 3.0 IGO).
Release 2026-01.
View this entity in the official WHO ICD-11 browser .
This page reproduces WHO classification content for reference. It is not
medical advice and must not be used to diagnose or treat. For coding
decisions, consult the official release and your national coding guidelines.
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