Approach to Diagnosing Inborn Errors of Immunity

Area of Science:

• Immunology
• Genetics
• Pediatrics
• Internal Medicine

Background:

• Inborn errors of immunity (IEI) manifest with a wide spectrum of clinical features, including immunodeficiency, autoimmunity, autoinflammation, atopy, and increased cancer risk.
• These complex disorders are not confined to pediatric populations or individuals with recurrent infections, necessitating broader clinical awareness.
• While initial clinical evaluation and immunophenotyping offer clues, definitive diagnosis frequently requires advanced methodologies.

Purpose of the Study:

• To underscore the broad clinical spectrum of inborn errors of immunity.
• To emphasize the importance of maintaining a high index of suspicion for IEI across diverse patient demographics.
• To highlight the necessity of integrating multimodal data, including genomics, for accurate diagnosis.

Main Methods:

• Review of current understanding and clinical presentations of inborn errors of immunity.
• Discussion of diagnostic approaches, including standard immunophenotyping.
• Emphasis on the role of integrated data analysis, particularly genomics, in achieving diagnosis.

Main Results:

• Inborn errors of immunity present with manifold features beyond primary immunodeficiency.
• Clinical suspicion for IEI should extend beyond traditional demographics and presentations.
• Genomic data integration is crucial for diagnosing complex IEI cases.

Conclusions:

• Inborn errors of immunity represent a heterogeneous group of disorders with diverse clinical manifestations.
• A comprehensive diagnostic strategy, incorporating clinical, immunological, and genomic data, is essential for accurate identification and management of IEI.
• Increased awareness and a systematic approach are vital for timely diagnosis of these conditions.