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ORPHA:666Disease
Also called OI · Brittle bone disease · Glass bone disease · Lobstein disease
What it is
A rare, genetic, primary bone dysplasias characterized by increased bone fragility, low bone mass, and susceptibility to bone fractures. The clinical severity is heterogeneous.
Key facts
- Prevalence
- 1-5 / 10 000
- Age of onset
- All ages
- Inheritance
- Autosomal dominant, Autosomal recessive, X-linked recessive
- Classified as
- Disease
Prevalence figures describe populations, not individuals, and are often estimates from a single study. Where the figure is an incidence or a birth prevalence, it says so.
Signs and symptoms
Very common80–99%
19- Abnormality of dental color
- Abnormality of dental enamel
- Abnormality of tibia morphology
- Abnormal metaphysis morphology
- Abnormal rib morphology
- Brachycephaly
- Carious teeth
- Convex nasal ridge
- Decreased skull ossification
- Diaphyseal thickening
- Gait disturbance
- Hearing impairment
- Intrauterine growth retardation
- Macrocephaly
- Micrognathia
- Mixed hearing impairment
- Pectus carinatum
- Prominent occiput
- Thin ribs
Common30–79%
39- Abnormal cardiovascular system morphology
- Abnormal cortical bone morphology
- Abnormal form of the vertebral bodies
- Abnormality of femur morphology
- Abnormality of long bone morphology
- Abnormality of the dentition
- Abnormality of the hip bone
- Anxiety
- Biconcave vertebral bodies
- Blue sclerae
- Bone pain
- Corneal opacity
- Cutis laxa
- Dental malocclusion
- Dentinogenesis imperfecta
- Enlarged vertebral pedicles
- Exercise intolerance
- Fatigue
- Femoral bowing
- Fractures of the long bones
- Genu valgum
- Glaucoma
- Hypercalciuria
- Hyperhidrosis
- Increased susceptibility to fractures
- Joint hypermobility
- Large fontanelles
- Loss of ambulation
- Multiple ribs fractures
- Narrow chest
- Osteopenia
- Osteoporosis
- Progressive hearing impairment
- Recurrent fractures
- Reduced bone mineral density
- Short stature
- Slender long bone
- Vertebral compression fracture
- Visual impairment
Sometimes5–29%
33- Abnormality of the endocardium
- Arthralgia
- Bowing of the long bones
- Bruising susceptibility
- Calcification of the interosseus membrane of the forearm
- Constipation
- Delayed eruption of teeth
- Dislocated radial head
and 25 more in this range
Rare1–4%
22- Aortic aneurysm
- Aortic dissection
- Aortic regurgitation
- Aortic root aneurysm
- Arterial dissection
- Ataxia
- Basilar invagination
- Brain stem compression
and 14 more in this range
These ranges are how often a sign appears across everyone diagnosed, not a prediction for one person — most people have some of these and not others. Orphanet also records findings that are specifically absent in this disease; those are in the data but not listed here.
Genes reported in subtypes
Orphanet records these genes on 5 more specific entries under this disorder, not on this entry itself:
A well-studied disease is usually split into subtypes, and the gene is curated on whichever one the evidence belongs to. Open a subtype to see which gene goes with it.
ICD-10 codes
ICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. A shared code identifies the group, not this disease — the ORPHAcode above is what identifies it.
Related health topics
Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.
Cross-references
Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.
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