Traits

Traits linked to HYOU1

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The Human Phenotype Ontology links 26 traits to HYOU1, by body system: features seen in people with one of the gene's rare conditions.

Abnormality of head or neck

Trait	How often it is seen
High frontal hairline	Always
High palate	Always
Little lower jaw	Always
Narrow face	Always
Narrow nose	Always
Oval face	Always
Recurrent canker sores	Always
Recurrent colds	Always
Wide nasal bridge	Always

Abnormality of the immune system

Trait	How often it is seen
Acne inversa	Always
Complete or near-complete absence of specific antibody response to unconjugated pneumococcus polysaccharide	Always
Decreased immune function	Always
HSV encephalitis	Always
Infection in blood stream	Always
Recurrent chest infections	Always
Recurrent skin infections	Always

Abnormality of the digestive system

Trait	How often it is seen
Chronic diarrhea	Always
Enlarged liver	Always
Malabsorption	Always
Prolonged yellowing of skin in newborn	Always

Abnormality of blood and blood-forming tissues

Trait	How often it is seen
Decreased class-switched memory B cell proportion	Always

Abnormality of limbs

Trait	How often it is seen
Slender finger	Always

Abnormality of the cardiovascular system

Trait	How often it is seen
Inflammation of artery	Always

Abnormality of the musculoskeletal system

Trait	How often it is seen
Pigeon chest	Always

Growth abnormality

Trait	How often it is seen
Short stature	Always

Laboratory abnormality

Trait	How often it is seen
Low blood sugar	Always

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.

Where this comes from

The Human Phenotype Ontology, release 2026-09-01: the traits linked to HYOU1 and how often each is seen. Find out more at hpo.jax.org.

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