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Traits

Traits linked to IGSF1

immunoglobulin superfamily member 1

The Human Phenotype Ontology links 5 traits to IGSF1, by body system: features seen in people with one of the gene's rare conditions.

Abnormality of the endocrine system

TraitHow often it is seen
Inappropriately normal thyroid-stimulating hormone levelAlways
Underactive thyroidAlways
Reduced circulating prolactin concentrationOften (30–79%)
Reduced TSH response to thyrotrophin-releasing hormone stimulation testNot recorded

Growth abnormality

TraitHow often it is seen
OverweightNot 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 IGSF1 and how often each is seen. Find out more at hpo.jax.org.

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