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Mental retardation in childhood: clinical and diagnostic profile in 100 children

I Bradinova1, S Shopova, E Simeonov

  • 1Department of Pediatrics, Medical faculty, Sofia, Bulgaria.

Genetic Counseling (Geneva, Switzerland)
|November 2, 2005
PubMed

Insights

This study investigated 100 children with mental retardation, finding that 41% received a diagnosis. Most cases remained of unknown etiology, highlighting the need for advanced genetic testing in pediatric care.

Area of Science:

  • Pediatric Genetics
  • Clinical Genetics
  • Developmental Disorders

Background:

  • Mental retardation (MR) affects 2-3% of the population, often leading to pediatric genetic counseling referrals.
  • Etiology remains undefined in 30-50% of MR cases despite thorough evaluation.
  • Understanding the causes of MR is crucial for diagnosis and management.

Purpose of the Study:

  • To assess the diagnostic yield of comprehensive genetic evaluation in children with mental retardation.
  • To categorize the etiological factors contributing to mental retardation in a pediatric cohort.
  • To identify challenges and opportunities in diagnosing developmental disorders.

Main Methods:

  • A cohort of 100 consecutive children with mental retardation was evaluated.
  • Included detailed dysmorphologic, neurologic, and developmental assessments.
  • Utilized cytogenetic, biochemical, and molecular genetic testing.

Main Results:

  • The overall diagnostic yield was 41% for the evaluated group.
  • Etiologies were classified as genetic (35%), multifactorial (3%), environmental (3%), and unknown (59%).
  • A significant proportion of cases remained undiagnosed, indicating diagnostic challenges.

Conclusions:

  • Comprehensive genetic evaluations can diagnose a substantial portion of pediatric mental retardation cases.
  • The high rate of unknown etiology underscores the need for advanced diagnostic approaches.
  • Further research into novel genetic and environmental factors is warranted for unexplained cases.

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