Rare diseases · Sign or symptom
Slender long bone
Long bones slender
HP:0003100
What it means
Reduced diameter of a long bone.
Rare diseases that can present with this20
Very common80–99%
9- 3M syndrome
- Ear-patella-short stature syndrome
- Intellectual disability-seizures-hypophosphatasia-ophthalmic-skeletal anomalies syndrome
- Marfanoid habitus-autosomal recessive intellectual disability syndrome
- Marshall-Smith syndrome
- Multicentric carpo-tarsal osteolysis with or without nephropathy
- Pelvic dysplasia-arthrogryposis of lower limbs syndrome
- Spinocerebellar ataxia-dysmorphism syndrome
- Thin ribs-tubular bones-dysmorphism syndrome
Common30–79%
6The 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: Gracile long bones · Slender long bones · Slender, gracile long tubular bones · Thin gracile long bones · Thin long bones · Thin, gracile long bones
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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.