Malformations among the X-linked intellectual disability syndromes

Area of Science:

• Medical Genetics
• Developmental Biology
• Pediatric Health

Background:

• Congenital malformations are a major cause of mortality and disability in children.
• The co-occurrence of malformations with intellectual disability, particularly X-linked intellectual disability (XLID), can exacerbate health burdens and necessitate specialized care.

Purpose of the Study:

• To investigate the prevalence and types of malformations associated with X-linked intellectual disability (XLID) syndromes.
• To assess the health burden and potential for medical or surgical intervention for these malformations.

Main Methods:

• Review and analysis of data pertaining to 153 known X-linked intellectual disability (XLID) syndromes.
• Categorization of malformations based on their type, frequency within XLID syndromes, and amenability to treatment.

Main Results:

• Malformations are present in nearly half of the studied X-linked intellectual disability (XLID) syndromes.
• Genitourinary abnormalities are the most common malformations but typically have a low health impact.
• Severe malformations like lissencephaly and renal agenesis are untreatable, while others such as hydrocephaly and cardiac defects may be corrected.

Conclusions:

• Malformations are a significant feature of many X-linked intellectual disability (XLID) syndromes, contributing to the overall health challenges.
• The type and severity of malformations vary widely, influencing the need for and potential success of medical and surgical interventions.