Rare diseases · Sign or symptom

Cerebral cortical hemiatrophy

HP:0100308

What it means

Atrophy of one side of the brain, characterized by findings including thinning of the cerebral cortex, reduced volume of the cerebral white matter with abnormal myelination, and enlargement of the ispilateral fourth ventricle.

Rare diseases that can present with this9

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category

Cerebral cortical hemiatrophy

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This page uses the Human Phenotype Ontology (2026-06-23) — Human Phenotype Ontology Consortium, hpo.jax.org. Disease associations from Orphanet (INSERM), CC BY 4.0. Content is educational and is not medical advice.