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Chromosomal anomalies in 1,000 children referred with suspected genetic disorders
D Navsaria1, T Mathews, R A Conte
1Division of Genetics, Long Island College Hospital-SUNY Health Science Center, Brooklyn 11201.
Insights
Chromosomal abnormalities were found in 16.6% of 1000 pediatric patients with clinical disorders, a rate significantly higher than in the general population. This study highlights the prevalence of genetic anomalies in children with various health conditions.
Area of Science:
- Genetics
- Pediatrics
- Clinical Diagnostics
Background:
- Chromosomal abnormalities are a significant cause of congenital disorders.
- Early detection of chromosomal anomalies is crucial for timely intervention and management in pediatric patients.
- Understanding the prevalence of these anomalies in children with clinical disorders aids in genetic counseling and research.
Purpose of the Study:
- To investigate the prevalence of chromosomal abnormalities in a cohort of 1000 children with diverse clinical disorders.
- To compare the observed rates of chromosomal anomalies with those in an unselected control population.
- To analyze the sex ratio within the study population and specifically for Down's syndrome cases.
Main Methods:
- Recruitment of 1000 pediatric patients (newborns to 13 years) with various clinical disorders.
- Cytogenetic analysis to detect chromosomal abnormalities.
- Statistical comparison of anomaly rates between the study group and a control population.
Main Results:
- Chromosomal abnormalities were identified in 16.6% (166 out of 1000) of the children.
- This prevalence is significantly higher (p < 0.01) compared to the 0.48-0.55% rate in an unselected population.
- The overall male:female ratio in the study was 3:2, consistent with the sex ratio observed in Down's syndrome cases within this cohort.
Conclusions:
- Pediatric patients with clinical disorders exhibit a substantially elevated risk of chromosomal abnormalities.
- The findings underscore the importance of cytogenetic evaluation in the diagnostic workup of children with unexplained clinical conditions.
- The observed sex ratio in Down's syndrome cases warrants further investigation into potential sex-specific etiological factors.
Abstract:
One thousand children ranging from newborns to 13 years of age with a variety of clinical disorders were referred to us to investigate the possible presence of chromosomal abnormalities. Various types of chromosomal anomalies were found in 166 children (16.6%), which is significantly (p < 0.01) higher than in an unselected (control) population (0.48-0.55%). The male:female ratio was 3:2 for the total population. Furthermore, in our survey population, the sex ratio of Down's syndrome cases of males to females was 3:2.