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Trait

Enlarged sylvian cistern

An increase in size of the subarachnoid space associated with the lateral cerebral sulcus (Sylvian fissure).

HPO HP:0100952

Summary

Also called
Enlarged lateral fissure, Enlarged lateral sulcus, Enlarged sylvian fissure
Body system
Abnormality of the nervous system

5 genes linked to Enlarged sylvian cistern

Changes in these genes cause rare conditions in which Enlarged sylvian cistern is seen. Most people with this trait have none of those conditions, and a gene on this list says nothing about anyone's own genome.

GeneHow often it is seenConditions
RAB3GAP1RAB3 GTPase activating protein catalytic subunit 1AlwaysIn 1 condition
RAB3GAP2RAB3 GTPase activating non-catalytic protein subunit 2AlwaysIn 1 condition
GCDHglutaryl-CoA dehydrogenaseVery often (80–99%)In 1 condition
PGAP1post-GPI attachment to proteins inositol deacylase 1Often (30–79%)In 1 condition
AFG2BAAA ATPase AFG2BNot recordedIn 1 condition

How often is among people with one of the gene's conditions, the most often across them, as the Human Phenotype Ontology records it. These pages describe traits and the research behind them; they are not a diagnosis, and a doctor or genetic counsellor is the person to ask about symptoms.

Broader traits

Ventriculomegaly

Where this comes from

  • The Human Phenotype Ontology, release 2026-09-01: the trait, its names, its definition and the genes linked to it. Find out more at hpo.jax.org.
  • Data release 2026.10.16-c6eea6bf.

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