Rare diseases · Sign or symptom
Hypoplasia of the radius
Underdeveloped outer large forearm bone
HP:0002984
What it means
Underdevelopment of the radius.
Rare diseases that can present with this26
Very common80–99%
11- Absent radius-anogenital anomalies syndrome
- Acro-renal-mandibular syndrome
- IVIC syndrome
- Léri-Weill dyschondrosteosis
- Lethal faciocardiomelic dysplasia
- Mietens syndrome
- Postaxial acrofacial dysostosis
- Radial hypoplasia-triphalangeal thumbs-hypospadias-maxillary diastema syndrome
- Radio-renal syndrome
- Roberts syndrome
- Ulna hypoplasia-intellectual disability syndrome
Common30–79%
11The 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
Also called: Hypoplastic radii · Hypoplastic radius · Radial hypoplasia · Radial ray hypoplasia · Short radii · Short radius · Shortening of radius
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Start free with EleplanThis 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.