Tap on and choose 'Add to Home Screen' to create a shortcut app

Tap on and choose 'Add to Home Screen/Install App' to create a shortcut app

Epidemiology of Metabolic Bone Disease in Children

This page was last updated on March 19th, 2018

Incidence and Prevalence

  • Rare inherited disorders of varying incidence: The bone dysplasias are a disparate group of rare inherited disorders. Their nomenclature and classification are complex, and diagnosis usually requires expert genetic and radiological opinion (41).  The incidence and mode of inheritance of some of the more frequently encountered conditions are shown in the table.
Disease Incidence
Achondroplasia 1:16,000-1:35,000
Spondyloepiphyseal dysplasia 1:100,000
Hurler syndrome 1:80,000
Hunter syndrome 1:250,000
Morquio syndrome 1:80,000
Maroteaux–Lamy syndrome 1:300,000
Osteogenesis imperfecta 1:20,000
Larsen syndrome 1:100,000

 Age Distribution

  • Metabolic condition present at birth: The diagnosis of the bone dysplasias is rarely the province of the pediatric neurosurgeon. In most instances, the diagnosis will have been made by the time neurosurgical opinion is sought. The suspicion of a bone dysplasia may arise at birth or in infancy as a result of dysmorphic features, growth retardation, joint deformity, or systemic illness such as respiratory insufficiency.
  • Age for onset of symptoms variable: The neurological consequences of the bone dysplasias (at least those that are of relevance to the neurosurgeon) for the most part arise as a consequence of bony or ligamentous involvement. This may comprise bone deformity, weakness, ligamentous thickening, or ligamentous laxity. The age by which these changes result in neurological deterioration is variable.

Sex Predilection

  • Hunter syndrome only X-linked: Hunter syndrome (mucopolysaccharidosis type II)  is the only X-linker disorder among the more common metabolic bone disorders.

Risk Factors

  • Advanced parental age: An affected parent increases the risk according to the usual rules of inheritance. However, children with many of these conditions may be born to unaffected parents as a result of a spontaneous mutation. Advanced paternal age has been associated with increased risk of new mutations in cases of achondroplasia, Marfan syndrome, thanatophoric dysplasia, and osteogenesis imperfecta.

Relationships to Other Disease States and Syndromes

  • Comorbidities common: Children with metabolic bone disease commonly have significant comorbidities (for example, respiratory and cardiac involvement). These conditions may be life limiting and frequently have implications for surgery and anesthesia.


Your donations keep us going

The ISPN Guide is free to use, but we rely on donations to fund our ongoing work and to maintain more than a thousand pages of information created to disseminate the most up-to-date knowledge in the field of paediatric neurosurgery.

By making a donation to The ISPN Guide you are also indirectly helping the many thousands of children around the world whose treatment depends on well-informed surgeons.

Please consider making a donation today.

Use the app

The ISPN Guide can be used as a standalone app, both on mobile devices and desktop computers. It’s quick and easy to use.

Fully featured

Free registration grants you full access to The Guide and host of featured designed to help further your own education.

Stay updated

The ISPN Guide continues to expand both in breadth and depth. Join our mailing list to stay up-to-date with our progress.