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Traits

Traits linked to HNMT

histamine N-methyltransferase

The Human Phenotype Ontology links 9 traits to HNMT, by body system: features seen in people with one of the gene's rare conditions.

Abnormality of the nervous system

TraitHow often it is seen
Motor delaySometimes (5–29%)
Delayed speech and language developmentNot recorded
Global developmental delayNot recorded
Intellectual disabilityNot recorded
Intellectual disability, severeNot recorded

Abnormality of the respiratory system

TraitHow often it is seen
Airway hyperresponsivenessNot recorded
BronchoconstrictionNot recorded

Abnormality of head or neck

TraitHow often it is seen
Abnormally small headNot recorded

Abnormality of the immune system

TraitHow often it is seen
AsthmaNot recorded

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 HNMT and how often each is seen. Find out more at hpo.jax.org.

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