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Mild form of Hunter's syndrome: clinical delineation based on 31 cases
Abstract:
The clinical features are described in 31 cases of the mild form of Hunter's syndrome (mucopolysaccharidosis II) ascertained in the British Isles. The mean age at onset was 4.3 years and at death was 21.7 years. Each patient had a large head and short stature. Umbilical and inguinal herniae were recorded in 95% and 61% of the cases. Evidence of cardiac disease was found in 91%; this was the most common cause of death. All of the patients suffered from frequent upper or lower respiratory tract infection. Middle airways obstruction proved to be a particular hazard. A high incidence of sensorineural deafness and unexplained papilloedema was noted. The importance of regular health care for these individuals is stressed.
Insights
Mild Hunter syndrome (mucopolysaccharidosis II) presents with characteristic features like large heads, short stature, and significant cardiac and respiratory issues. Early and regular healthcare is crucial for managing this genetic disorder.
Area of Science:
- Medical Genetics
- Pediatrics
- Rare Diseases
Background:
- Hunter syndrome, also known as mucopolysaccharidosis II (MPS II), is a rare genetic disorder.
- Mild forms of MPS II present unique clinical challenges and require specific management strategies.
Purpose of the Study:
- To describe the clinical features of mild Hunter syndrome (MPS II) in a cohort from the British Isles.
- To identify common health issues and causes of mortality in individuals with mild MPS II.
Main Methods:
- Retrospective analysis of clinical data from 31 patients with mild Hunter syndrome.
- Documentation of onset age, mortality, physical characteristics, and common comorbidities.
Main Results:
- Mean age at onset was 4.3 years, and mean age at death was 21.7 years.
- Common features included large head, short stature, hernias (95% umbilical, 61% inguinal), cardiac disease (91%), and frequent respiratory infections.
- Middle airways obstruction, sensorineural deafness, and papilloedema were notable findings.
Conclusions:
- Mild Hunter syndrome is characterized by significant cardiac and respiratory complications, with cardiac disease being the primary cause of death.
- Regular medical surveillance and management are essential for individuals with MPS II to address complications like respiratory obstruction and deafness.