Traits

Traits linked to SLC9A7

solute carrier family 9 member A7

The Human Phenotype Ontology links 27 traits to SLC9A7, by body system: features seen in people with one of the gene's rare conditions.

Abnormality of the nervous system

Trait	How often it is seen
Global developmental delay	Always
IQ between 34 and 49	Always
Brisk reflexes	Often (30–79%)
Delayed ability to walk	Often (30–79%)
Abnormal gait	Sometimes (5–29%)
Attention deficit	Sometimes (5–29%)
Babinski sign	Sometimes (5–29%)
Delayed ability to sit	Sometimes (5–29%)
Delayed speech and language development	Sometimes (5–29%)
Wide based walk	Sometimes (5–29%)

Abnormality of head or neck

Trait	How often it is seen
Long face	Often (30–79%)
Downward slanting of the opening between the eyelids	Sometimes (5–29%)
Drooling	Sometimes (5–29%)
Long philtrum	Sometimes (5–29%)
Midface retrusion	Sometimes (5–29%)
Myopathic facies	Sometimes (5–29%)
Thin red part of the upper lip	Sometimes (5–29%)
High frontal hairline	Not recorded

Abnormality of the musculoskeletal system

Trait	How often it is seen
Low muscle tone	Often (30–79%)
Proximal neurogenic muscle weakness	Often (30–79%)
Generalized decreased muscle tone	Sometimes (5–29%)
Muscle weakness	Sometimes (5–29%)

Abnormality of limbs

Trait	How often it is seen
Curvature of little finger	Often (30–79%)
Dropped arches	Sometimes (5–29%)

Abnormality of the eye

Trait	How often it is seen
Cross-eyed	Sometimes (5–29%)
Deeply set eye	Sometimes (5–29%)

Growth abnormality

Trait	How often it is seen
Overweight	Often (30–79%)

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 SLC9A7 and how often each is seen. Find out more at hpo.jax.org.

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