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Rare diseases · Sign or symptom

Humeroradial synostosis

Fusion of upper and lower arm bones

HP:0003041

What it means

An abnormal osseous union (fusion) between the radius and the humerus.

Rare diseases that can present with this6

Very common80–99%

1

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category

Abnormal humerus morphologyAbnormality of the humeroradial jointAbnormal morphology of the radiusSynostosis involving the elbow

Also called: Humeral radial synostosis · Humeral-radial synostosis · Radiohumeral synostosis of elbow · Synostosis of radius and humerus

Humeroradial synostosis

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This page uses the Human Phenotype Ontology (2026-06-23) — Human Phenotype Ontology Consortium, hpo.jax.org. Disease associations from Orphanet (INSERM), CC BY 4.0. Content is educational and is not medical advice.