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Diminished radial count is found only postnatally in Down's syndrome
T P Cooney1, P J Wentworth, W M Thurlbeck
1Department of Pathology, University of British Columbia, Vancouver, Canada.
Pediatric Pulmonology
|January 1, 1988
Summary
Lung development in Down's syndrome shows normal complexity at birth but decreases postnatally. This leads to enlarged alveoli and a unique double capillary network in affected individuals.
Area of Science:
- Pulmonary Medicine
- Pediatric Pathology
- Genetics
Background:
- Down syndrome is associated with various health complications, including potential respiratory issues.
- Understanding lung development in Down syndrome is crucial for managing associated conditions.
Purpose of the Study:
- To investigate the changes in lung acinar complexity in individuals with Down syndrome.
- To characterize the microscopic and gross pulmonary features in Down syndrome.
Main Methods:
- Radial count was used to assess acinar complexity in 23 patients with Down syndrome.
- Gross and microscopic examination of lung tissue was performed.
Main Results:
- Lung acinar complexity is normal late in intrauterine growth but decreases postnatally, evident by 4 months.
- Grossly, the lung exhibits diffuse porosity; microscopically, dilated alveoli and alveolar ducts are observed.
- Individuals with Down syndrome have fewer, enlarged alveoli, often with a unique double capillary network, unrelated to cardiac or hypertensive disease.
Conclusions:
- The unique lung morphology in Down syndrome results from impaired postnatal lung development, likely genetically determined.
- The observed pulmonary changes are distinct and not correlated with other common Down syndrome-related conditions.