Trait

Aplastic zygomatic arch

Developmental defect characterized by the absence of the zygomatic arch.

Body system: Abnormality of head or neck Abnormality of the musculoskeletal system

This page as data

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library(jsonlite)

url <- "https://dantelabs.com/traits/aplastic-zygomatic-arch.json"
page <- fromJSON(url)
page$trait$name

Open the JSON

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2 genes linked to Aplastic zygomatic arch

Changes in these genes cause rare conditions in which Aplastic zygomatic arch 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.

Gene	How often it is seen	Conditions
POLR1ARNA polymerase I subunit A	Often (30–79%)	In 1 condition
TWIST2twist family bHLH transcription factor 2	Sometimes (5–29%)	In 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

Abnormal zygomatic arch morphology

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 2026.10.17-8666dff2.

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