Developmental delay: when to suspect and how to investigate for an inborn error of metabolism

Area of Science:

• Pediatrics
• Medical Genetics
• Biochemistry

Background:

• Developmental delay is a frequent pediatric concern.
• Inborn errors of metabolism (IEMs) are infrequent but critical causes of developmental delay.
• Identifying IEMs enables genetic counseling, prevention of metabolic crises, and targeted therapies.

Purpose of the Study:

• To establish practical guidelines for suspecting and investigating inborn errors of metabolism in pediatric developmental delay.
• To equip clinicians with tools for recognizing IEMs in children presenting with developmental delay.

Main Methods:

• Review of clinical situations indicative of IEMs.
• Identification of key historical risk factors.
• Highlighting significant physical examination findings.
• Recommending appropriate biochemical investigations for children with developmental delay.

Main Results:

• Specific clinical scenarios strongly suggest IEMs as a cause of developmental delay.
• A systematic approach incorporating history, examination, and biochemical tests aids in IEM detection.
• Adherence to guidelines minimizes the risk of overlooking IEMs.

Conclusions:

• Implementing these guidelines enhances the diagnostic yield for IEMs in pediatric developmental delay.
• Early and accurate diagnosis of IEMs is vital for patient management and family planning.
• This review serves as a practical resource for clinicians managing children with developmental delay.