Rare diseases · Sign or symptom
Anterior predominant thick cortex pachygyria
HP:0020191
What it means
Pachygyria with cortical thickness greater than 10 mm and an anterior predominant severity gradient. The severity gradient is determined based on the gyral width, with gyri typically wider than 5mm over the more severely affected regions. Anterior predominant gradient indicates pachygyria more severe over the frontal and temporal lobes.
Rare diseases that can present with this1
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
Also called: Pachygyria with cortical thickness > 10 mm anterior predominant
Tracking symptoms like this for someone? Eleplan keeps symptoms, diagnoses, medications and every specialist in one plan.
Start free with EleplanThis 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.