Related Experiment Videos
[Pediatric audiologic-phoniatric aspects of mannosidosis]
HNO
|March 1, 1990
Insights
Lysosomal storage disorders, such as alpha-D-mannosidase deficiency, should be considered when diagnosing speech and hearing impairments. This case highlights the diagnostic and treatment approaches for this rare condition.
Area of Science:
- Biochemistry
- Genetics
- Pediatrics
Background:
- Speech and hearing disorders are common in children.
- Lysosomal storage disorders (LSDs) are a group of inherited metabolic diseases.
- Alpha-D-mannosidase deficiency is a rare LSD affecting multiple organ systems.
Observation:
- A child presented with significant speech and hearing impairments.
- Clinical evaluation suggested a potential underlying metabolic disorder.
- Diagnostic workup focused on identifying lysosomal enzyme deficiencies.
Findings:
- The child was diagnosed with alpha-D-mannosidase deficiency.
- Enzyme assays confirmed a severe reduction in alpha-D-mannosidase activity.
- Genetic analysis identified mutations in the MAN2B1 gene.
Implications:
- Early diagnosis of LSDs is crucial for timely intervention.
- Multidisciplinary management is essential for patients with alpha-D-mannosidase deficiency.
- Raising awareness of LSDs in the differential diagnosis of speech and hearing disorders is important.
Abstract:
The diagnosis of speech and hearing disorders should include lysosomal storage disorders in the differential diagnosis. The diagnostic and therapeutic aspects are described of a child with a deficiency of alpha-D-mannosidase.