Traits

Traits linked to CD109

CD109 molecule

The Human Phenotype Ontology links 17 traits to CD109, by body system: features seen in people with one of the gene's rare conditions.

Abnormality of blood and blood-forming tissues

Trait	How often it is seen
Neonatal alloimmune thrombocytopenia	Always
Bleeding tendency	Often (30–79%)
Blood spots	Often (30–79%)
Cephalohematoma	Often (30–79%)
Petechiae	Often (30–79%)
Spontaneous hematomas	Often (30–79%)
Black feces	Sometimes (5–29%)
Bleeding within the skull	Sometimes (5–29%)
Ecchymosis	Sometimes (5–29%)
Gastrointestinal bleeding	Sometimes (5–29%)
Subarachnoid hemorrhage	Rarely (1–4%)

Abnormality of the nervous system

Trait	How often it is seen
Abnormality of the nervous system	Rarely (1–4%)
Cerebral palsy	Rarely (1–4%)
Global developmental delay	Rarely (1–4%)

Abnormality of the ear

Trait	How often it is seen
Bilateral sensorineural hearing impairment	Rarely (1–4%)

Abnormality of the eye

Trait	How often it is seen
Blindness	Rarely (1–4%)

Laboratory abnormality

Trait	How often it is seen
Blood in urine	Sometimes (5–29%)

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 CD109 and how often each is seen. Find out more at hpo.jax.org.

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